SECURITY

USN-4110-2: Dovecot vulnerability dovecot vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 ESM Ubuntu 12.04 ESM Summary Dovecot could be made to crash or execute arbitrary code if it received a specially crafted data. Software Description dovecot – IMAP and POP3 email server Details USN-4110-1 fixed a vulnerability in Dovecot. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled certain data. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM dovecot-core – 1:2.2.9-1ubuntu2.6+esm1 Ubuntu 12.04 ESM dovecot-core – 1:2.0.19-0ubuntu2.7 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. In [ more… ]

USN-4110-1: Dovecot vulnerability dovecot vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 19.04 Ubuntu 18.04 LTS Ubuntu 16.04 LTS Summary Dovecot could be made to crash or execute arbitrary code if it received a specially crafted data. Software Description dovecot – IMAP and POP3 email server Details Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled certain data. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04 dovecot-core – 1:2.3.4.1-1ubuntu2.3 Ubuntu 18.04 LTS dovecot-core – 1:2.2.33.2-1ubuntu4.4 Ubuntu 16.04 LTS dovecot-core – 1:2.2.22-1ubuntu2.11 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. In general, a standard system update will make all the necessary changes. References CVE-2019-11500 Source: USN-4110-1: Dovecot [ more… ]

USN-4109-1: OpenJPEG vulnerabilities openjpeg2 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Summary Several security issues were fixed in OpenJPEG. Software Description openjpeg2 – JPEG 2000 image compression/decompression library Details It was discovered that OpenJPEG incorrectly handled certain PGX files. An attacker could possibly use this issue to cause a denial of service or possibly remote code execution. (CVE-2017-17480) It was discovered that OpenJPEG incorrectly handled certain files. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-14423) It was discovered that OpenJPEG incorrectly handled certain PNM files. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-18088) It was discovered that OpenJPEG incorrectly handled certain BMP files. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-5785, CVE-2018-6616) Update instructions [ more… ]

USN-4108-1: Zstandard vulnerability libzstd vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Summary Zstandard could be made to execute arbitrary code if it received specially crafted input. Software Description libzstd – fast lossless compression algorithm – development files Details It was discovered that Zstandard incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS libzstd1 – 1.3.3+dfsg-2ubuntu1.1 zstd – 1.3.3+dfsg-2ubuntu1.1 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. In general, a standard system update will make all the necessary changes. References CVE-2019-11922 Source: USN-4108-1: Zstandard vulnerability