Cisco Security Advisories

2017. november 15.

Cisco Meeting Server H.264 Decoding Denial of Service Vulnerability

A vulnerability in the H.264 decoder function of Cisco Meeting Server could allow an unauthenticated, remote attacker to cause a Cisco Meeting Server media process to restart unexpectedly when it receives an illegal H.264 frame.

The vulnerability is triggered by an H.264 frame that has an invalid picture parameter set (PPS) value. An attacker could exploit this vulnerability by sending a malformed H.264 frame to the targeted device. An exploit could allow the attacker to cause a denial of service (DoS) condition because the media process could restart. The media session should be re-established within a few seconds, during which there could be a brief interruption in service.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-cms
Security Impact Rating: Medium
CVE: CVE-2017-12311
2017. november 15.

Cisco Web Security Appliance Advanced Malware Protection File Bypass Vulnerability

A vulnerability in the Advanced Malware Protection (AMP) file filtering feature of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass a configured AMP file filtering rule. The file types affected are zipped or archived file types.

The vulnerability is due to incorrect and different file hash values when AMP scans the file. An attacker could exploit this vulnerability by sending a crafted email file attachment through the targeted device. An exploit could allow the attacker to bypass a configured AMP file filter.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-wsa
Security Impact Rating: Medium
CVE: CVE-2017-12303
2017. november 15.

Cisco Voice Operating System-Based Products Unauthorized Access Vulnerability

A vulnerability in the upgrade mechanism of Cisco collaboration products based on the Cisco Voice Operating System software platform could allow an unauthenticated, remote attacker to gain unauthorized, elevated access to an affected device.

The vulnerability occurs when a refresh upgrade or Prime Collaboration Deployment (PCD) migration is performed on an affected device. When a refresh upgrade or PCD migration is completed successfully, an engineering flag remains enabled and could allow root access to the device with a known password.

If the vulnerable device is subsequently upgraded using the standard upgrade method to an Engineering Special Release, service update, or a new major release of the affected product, this vulnerability is remediated by that action.

Note: Engineering Special Releases that are installed as COP files, as opposed to the standard upgrade method, do not remediate this vulnerability.

An attacker who can access an affected device over SFTP while it is in a vulnerable state could gain root access to the device. This access could allow the attacker to compromise the affected system completely.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-vos
Security Impact Rating: Critical
CVE: CVE-2017-12337
2017. november 15.

Cisco Umbrella Insights Virtual Appliance Static Credentials Vulnerability

A vulnerability in Cisco Umbrella Insights Virtual Appliances could allow an authenticated, local attacker to log in to an affected virtual appliance with root privileges.

The vulnerability is due to the presence of default, static user credentials for an affected virtual appliance. An attacker could exploit this vulnerability by using the hypervisor console to connect locally to an affected system and then using the static credentials to log in to an affected virtual appliance. A successful exploit could allow the attacker to log in to the affected appliance with root privileges.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-uva
Security Impact Rating: Medium
CVE: CVE-2017-12350
2017. november 15.

Cisco Unified Communications Manager SQL Injection Vulnerability

A vulnerability in the Cisco Unified Communications Manager SQL database interface could allow an authenticated, remote attacker to impact the confidentiality of the system by executing arbitrary SQL queries.

The vulnerability is due to a lack of input validation on user-supplied input in SQL queries. An attacker could exploit this vulnerability by sending crafted URLs that contain malicious SQL statements to the affected system. An exploit could allow the attacker to determine the presence of certain values in the database.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-ucm
Security Impact Rating: Medium
CVE: CVE-2017-12302
2017. november 15.

Cisco Spark Board Upgrade Signature Verification Bypass Vulnerability

A vulnerability in the upgrade process of Cisco Spark Board could allow an authenticated, local attacker to install an unverified upgrade package.

The vulnerability is due to insufficient upgrade package validation. An attacker could exploit this vulnerability by providing the upgrade process with an upgrade package that the attacker controls. An exploit could allow the attacker to install custom firmware to the Spark Board.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-spark
Security Impact Rating: Medium
CVE: CVE-2017-12306
2017. november 15.

Cisco RF Gateway 1 TCP Connection Denial of Service Vulnerability

A vulnerability in the TCP state machine of Cisco RF Gateway 1 devices could allow an unauthenticated, remote attacker to prevent an affected device from delivering switched digital video (SDV) or video on demand (VoD) streams, resulting in a denial of service (DoS) condition.

The vulnerability is due to a processing error with TCP connections to the affected device. An attacker could exploit this vulnerability by establishing a large number of TCP connections to an affected device and not actively closing those TCP connections. A successful exploit could allow the attacker to prevent the affected device from delivering SDV or VoD streams to set-top boxes.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-rf-gateway-1
Security Impact Rating: Medium
CVE: CVE-2017-12318
2017. november 15.

Cisco Registered Envelope Service Cross-Site Scripting Vulnerabilities

Multiple vulnerabilities in the web interface of the Cisco Registered Envelope Service could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack or redirect a user of the affected service to an undesired web page.

The vulnerabilities are due to insufficient validation of user-supplied input by the web-based management interface of the affected service. An attacker could exploit these vulnerabilities by persuading a user to click a malicious link or by sending an HTTP request that could cause the affected service to redirect the request to a specified malicious URL. A successful exploit could allow the attacker to execute arbitrary script code in the context of the web interface of the affected system or allow the attacker to access sensitive browser-based information on the affected system. These types of exploits could also be used in phishing attacks that send users to malicious websites without their knowledge.

There are no workarounds that address these vulnerabilities.

For additional information about cross-site scripting attacks and the methods used to exploit these vulnerabilities, see the following resources:
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-res
Security Impact Rating: Medium
CVE: CVE-2017-12290,CVE-2017-12291,CVE-2017-12292,CVE-2017-12320,CVE-2017-12321,CVE-2017-12322,CVE-2017-12323
2017. november 15.

Cisco Identity Services Engine Guest Portal Login Limit Bypass Vulnerability

A vulnerability in the Guest Portal login page of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to perform multiple login attempts in excess of the configured login attempt limit.

The vulnerability is due to insufficient server-side login attempt limit enforcement. An attacker could exploit this vulnerability by sending modified login attempts to the Guest Portal login page. An exploit could allow the attacker to perform brute-force password attacks on the ISE Guest Portal.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-ise
Security Impact Rating: Medium
CVE: CVE-2017-12316
2017. november 15.

Cisco IP Phone 8800 Series Command Injection Vulnerability in Debug Shell

A vulnerability in the debug interface of Cisco IP Phone 8800 series could allow an authenticated, local attacker to execute arbitrary commands.

The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by authenticating to the device and submitting additional command input to the affected parameter in the debug shell.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-ipp
Security Impact Rating: Medium
CVE: CVE-2017-12305
2017. november 15.

Cisco IOS and IOS XE Software IOS daemon Cross-Site Scripting Vulnerability

A vulnerability in the IOS daemon (IOSd) web-based management interface of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface on an affected device.

The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the web-based management interface or allow the attacker to access sensitive browser-based information.

Additional information about XSS attacks and potential mitigations can be found at:

https://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20060922-understanding-xss
https://www.owasp.org/index.php/Cross-site_Scripting_(XSS)

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-ios
Security Impact Rating: Medium
CVE: CVE-2017-12304
2017. november 15.

Cisco Immunet Antimalware Installer DLL Preloading Vulnerability

An untrusted search path vulnerability in the Cisco Immunet antimalware installer could allow an authenticated, local attacker to execute arbitrary code via DLL hijacking if a local user with administrative privileges executes the installer in the current working directory where a crafted DLL has been placed by an attacker.

The vulnerability is due to incomplete input validation of path and file names of a DLL file before it is loaded. An attacker could exploit this vulnerability by creating a malicious DLL file and installing it in a specific system directory. A successful exploit could allow the attacker to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account. An attacker would need valid user credentials to exploit this vulnerability.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-iami
Security Impact Rating: Medium
CVE: CVE-2017-12312
2017. november 15.

Cisco HyperFlex System Authenticated Information Disclosure Vulnerability

A vulnerability in system logging when replication is being configured with the Cisco HyperFlex System could allow an authenticated, local attacker to view sensitive information that should be restricted in the system log files. The attacker would have to be authenticated as an administrative user to conduct this attack.

The vulnerability is due to lack of proper masking of sensitive information in system log files. An attacker could exploit this vulnerability by authenticating to the targeted device and viewing the system log file. An exploit could allow the attacker to view sensitive system information that should have been restricted. The attacker could use this information to conduct additional reconnaissance attacks.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-hyperflex
Security Impact Rating: Medium
CVE: CVE-2017-12315
2017. november 15.

Cisco Firepower System Software Server Message Block Version 2 File Policy Bypass Vulnerability

A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a file policy that is configured to block the Server Message Block Version 2 (SMB2) protocol.

The vulnerability is due to the incorrect detection of an SMB2 file when the detection is based on the length of the file. An attacker could exploit this vulnerability by sending a crafted SMB2 transfer request through the targeted device. A successful exploit could allow the attacker to bypass filters that are configured to block SMB2 traffic.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-firepower2
Security Impact Rating: Medium
CVE: CVE-2017-12300
2017. november 15.

Cisco ASA Next-Generation Firewall Services Local Management Filtering Bypass Vulnerability

A vulnerability exists in the process of creating default IP blocks during device initialization for Cisco ASA Next-Generation Firewall Services that could allow an unauthenticated, remote attacker to send traffic to the local IP address of the device, bypassing any filters that are configured to deny local IP management traffic.

The vulnerability is due to an implementation error that exists in the process of creating default IP blocks when the device is initialized, and the way in which those IP blocks interact with user-configured filters for local IP management traffic (for example, SSH to the device). An attacker could exploit this vulnerability by sending traffic to the local IP address of the targeted device. A successful exploit could allow the attacker to connect to the local IP address of the device even when there are filters configured to deny the traffic.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-firepower1
Security Impact Rating: Medium
CVE: CVE-2017-12299
2017. november 15.

Cisco FindIT Discovery Utility Insecure Library Loading Vulnerability

A vulnerability in the Cisco FindIT Network Discovery Utility could allow an authenticated, local attacker to perform a DLL preloading attack, potentially causing a partial impact to the device availability, confidentiality, and integrity.

The vulnerability is due to the application loading a malicious copy of a specific, nondefined DLL file instead of the DLL file it was expecting. An attacker could exploit this vulnerability by placing an affected DLL within the search path of the host system. An exploit could allow the attacker to load a malicious DLL file into the system, thus partially compromising confidentiality, integrity, and availability on the device.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-findit
Security Impact Rating: Medium
CVE: CVE-2017-12314
2017. november 15.

Cisco Email Security Appliance HTTP Response Splitting Vulnerability

A vulnerability in the Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to conduct a HTTP response splitting attack.

The vulnerability is due to the failure of the application or its environment to properly sanitize input values. An attacker could exploit this vulnerability by injecting malicious HTTP headers, controlling the response body, or splitting the response into multiple responses. An exploit could allow the attacker to perform cross-site scripting attacks, cross-user defacement, web cache poisoning, and similar exploits.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-esa
Security Impact Rating: Medium
CVE: CVE-2017-12309
2017. november 15.

Cisco Network Academy Packet Tracer DLL Preload Vulnerability

An untrusted search path vulnerability in the Cisco Network Academy Packet Tracer software could allow an authenticated, local attacker to execute arbitrary code via DLL hijacking if a local user with administrative privileges executes the installer in the current working directory where a crafted DLL has been placed by an attacker.

The vulnerability is due to incomplete input validation of path and file names of a DLL file before it is loaded. An attacker could exploit this vulnerability by creating a malicious DLL file and installing it in a specific system directory. A successful exploit could allow the attacker to execute commands on the underlying Microsoft Windows host with privileges equivalent to the SYSTEM account. An attacker would need valid user credentials to exploit this vulnerability.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-cpt
Security Impact Rating: Medium
CVE: CVE-2017-12313
2017. november 3.

Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial of Service Vulnerability

A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing table, which could result in network instability.

The vulnerability exists due to changes in the implementation of the BGP MPLS-Based Ethernet VPN RFC (RFC 7432) draft between IOS XE software releases. When the BGP Inclusive Multicast Ethernet Tag Route or BGP EVPN MAC/IP Advertisement Route update packet is received, it could be possible that the IP address length field is miscalculated. An attacker could exploit this vulnerability by sending a crafted BGP packet to an affected device after the BGP session was established. An exploit could allow the attacker to cause the affected device to reload or corrupt the BGP routing table; either outcome would result in a DoS.

The Cisco implementation of the BGP protocol only accepts incoming BGP traffic from explicitly defined peers. To exploit this vulnerability, an attacker must be able to send the malicious packets over a TCP connection that appears to come from a trusted BGP peer, or inject malformed messages into the victim's BGP network. This would require obtaining information about the BGP peers in the affected system's trusted network.

The vulnerability may be triggered when the router receives a crafted BGP message from a peer on an existing BGP session. At least one BGP neighbor session must be established for a router to be vulnerable.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp
Security Impact Rating: Medium
CVE: CVE-2017-12319
2017. november 1.

Cisco Aironet 1560, 2800, and 3800 Series Access Point Platforms 802.11 Denial of Service Vulnerability

A vulnerability in 802.11 association request frame processing for the Cisco Aironet 1560, 2800, and 3800 Series Access Points could allow an unauthenticated, Layer 2 radio frequency (RF) adjacent attacker to cause the Access Point (AP) to reload, resulting in a denial of service (DoS) condition.

The vulnerability is due to insufficient frame validation of the 802.11 association request. An attacker could exploit this vulnerability by sending a malformed 802.11 association request to the targeted device. An exploit could allow the attacker to cause the AP to reload, resulting in a DoS condition while the AP is reloading.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-aironet1
Security Impact Rating: High
CVE: CVE-2017-12273