Ubuntu Secutity Notices

It was discovered that FreeRDP incorrectly handled certain memory operations. A remote attacker could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code.

USN-4646-1 fixed vulnerabilities in poppler. The fix for CVE-2019-10871 introduced a regression causing certain applications linked against poppler to fail. This update backs out the fix pending further investigation. We apologize for the inconvenience. Original advisory details: It was discovered that Poppler incorrectly handled certain files. If a user or automated system were tricked into opening a crafted PDF file, an attacker could cause a denial of service.

Jens Mueller discovered that xdg-utils incorrectly handled certain URI. An attacker could possibly use this issue to expose sensitive information.

A large number of security issues were discovered in the WebKitGTK Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across origins, bypass security restrictions, conduct phishing attacks, conduct cross-site scripting (XSS) attacks, bypass Content Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or execute arbitrary code.

It was discovered that Poppler incorrectly handled certain files. If a user or automated system were tricked into opening a crafted PDF file, an attacker could cause a denial of service.

It was discovered that Mutt incorrectly handled certain connections. An attacker could possibly use this issue to expose sensitive information.

It was discovered that igraph mishandled certain malformed XML. An attacker could use this vulnerability to cause a denial of service (crash).

It was discovered that atftp's FTP server did not properly handler certain input. An attacker could use this to to cause a denial of service (crash) or possibly execute arbitrary code. (CVE-2019-11365) It was discovered that atftp's FTP server did not make proper use of mutexes when locking certain data structures. An attacker could use this to cause a denial of service via a NULL pointer dereference. (CVE-2019-11366)

It was discovered that PDFResurrect incorrectly handled certain memory operations during PDF summary generation. An attacker could use this to cause out-of-bounds writes, resulting in a denial of service (system crash) or arbitrary code execution.

It was discovered that Libextractor incorrectly handled zero sample rate. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-15266) It was discovered that Libextractor incorrectly handled certain FLAC metadata. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-15267) It was discovered that Libextractor incorrectly handled certain specially crafted files. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-15600, CVE-2018-16430, CVE-2018-20430) It was discovered that Libextractor incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-15601) It was discovered that Libextractor incorrectly handled integers. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-15602) It was discovered that Libextractore incorrectly handled certain crafted files. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-15922) It was discovered tha Libextractor incorrectly handled certain files. An attacker could possibly use this issue to cause a denial of service. (CVE-2017-17440) It was discovered that Libextractor incorrectly handled certain malformed files. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-14346) It was discovered that Libextractor incorrectly handled malformed files. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-14347) It was discovered that Libextractor incorrectly handled metadata. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-20431)

James Henstridge discovered that an Ubuntu-specific patch caused PulseAudio to incorrectly handle snap client connections. An attacker could possibly use this to expose sensitive information.

USN-4634-1 fixed several vulnerabilities in OpenLDAP. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: It was discovered that OpenLDAP incorrectly handled certain malformed inputs. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service.

USN-4637-1 fixed vulnerabilities in Firefox. This update provides the corresponding updates for Ubuntu 16.04 LTS. Original advisory details: Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across origins, bypass security restrictions, conduct phishing attacks, conduct cross-site scripting (XSS) attacks, bypass Content Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or execute arbitrary code.

It was discovered that there was a bug in the way phpMyAdmin handles the phpMyAdmin Configuration Storage tables. An authenticated attacker could use this vulnerability to cause phpmyAdmin to leak sensitive files. (CVE-2018-19968) It was discovered that phpMyAdmin incorrectly handled user input. An attacker could possibly use this for an XSS attack. (CVE-2018-19970) It was discovered that phpMyAdmin mishandled certain input. An attacker could use this vulnerability to execute a cross-site scripting (XSS) attack via a crafted URL. (CVE-2018-7260) It was discovered that phpMyAdmin failed to sanitize certain input. An attacker could use this vulnerability to execute an SQL injection attack via a specially crafted database name. (CVE-2019-11768) It was discovered that phpmyadmin incorrectly handled some requests. An attacker could possibly use this to perform a CSRF attack. (CVE-2019-12616) It was discovered that phpMyAdmin failed to sanitize certain input. An attacker could use this vulnerability to execute an SQL injection attack via a specially crafted username. (CVE-2019-6798, CVE-2020-10804, CVE-2020-5504) It was discovered that phpMyAdmin would allow sensitive files to be leaked if certain configuration options were set. An attacker could use this vulnerability to access confidential information. (CVE-2019-6799) It was discovered that phpMyAdmin failed to sanitize certain input. An attacker could use this vulnerability to execute an SQL injection attack via a specially crafted database or table name. (CVE-2020-10802) It was discovered that phpMyAdmin did not properly handle data from the database when displaying it. If an attacker were to insert specially- crafted data into certain database tables, the attacker could execute a cross-site scripting (XSS) attack. (CVE-2020-10803) It was discovered that phpMyAdmin was vulnerable to an XSS attack. If a victim were to click on a crafted link, an attacker could run malicious JavaScript on the victim's system. (CVE-2020-26934) It was discovered that phpMyAdmin did not properly handler certain SQL statements in the search feature. An attacker could use this vulnerability to inject malicious SQL into a query. (CVE-2020-26935)

It was discovered that c-ares incorrectly handled certain DNS requests. An attacker could possibly use this issue to cause a denial of service.

Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across origins, bypass security restrictions, conduct phishing attacks, conduct cross-site scripting (XSS) attacks, bypass Content Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or execute arbitrary code.

It was discovered that LibVNCServer incorrectly handled certain internals. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Vino package ships with a LibVNCServer source and all listed releases were affected for this package.

Demi Obenour discovered that Kerberos incorrectly handled certain ASN.1. An attacker could possibly use this issue to cause a denial of service.

It was discovered that OpenLDAP incorrectly handled certain malformed inputs. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service.