[USN-2994-1] libxml2 vulnerabilities

Fabricante: Ubuntu
Fecha: 06/06/2016
Identificador: USN-2994-1
[USN-2994-1] libxml2 vulnerabilities
========================================================================== Ubuntu Security Notice USN-2994-1 June 06, 2016 libxml2 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS - Ubuntu 15.10 - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS Summary: Several security issues were fixed in libxml2. Software Description: - libxml2: GNOME XML library Details: It was discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service. (CVE-2015-8806, CVE-2016-2073, CVE-2016-3627, CVE-2016-3705, CVE-2016-4447) It was discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1762, CVE-2016-1834) Mateusz Jurczyk discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1833, CVE-2016-1838, CVE-2016-1839) Wei Lei and Liu Yang discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1835, CVE-2016-1837) Wei Lei and Liu Yang discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-1836) Kostya Serebryany discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-1840) It was discovered that libxml2 would load certain XML external entities. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly obtain access to arbitrary files or cause resource consumption. (CVE-2016-4449) Gustavo Grieco discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service. (CVE-2016-4483) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: libxml2 2.9.3+dfsg1-1ubuntu0.1 Ubuntu 15.10: libxml2 2.9.2+zdfsg1-4ubuntu0.4 Ubuntu 14.04 LTS: libxml2 2.9.1+dfsg1-3ubuntu4.8 Ubuntu 12.04 LTS: libxml2 2.7.8.dfsg-5.1ubuntu4.15 After a standard system update you need to reboot your computer to make all the necessary changes. References: http://www.ubuntu.com/usn/usn-2994-1 CVE-2015-8806, CVE-2016-1762, CVE-2016-1833, CVE-2016-1834, CVE-2016-1835, CVE-2016-1836, CVE-2016-1837, CVE-2016-1838, CVE-2016-1839, CVE-2016-1840, CVE-2016-2073, CVE-2016-3627, CVE-2016-3705, CVE-2016-4447, CVE-2016-4449, CVE-2016-4483 Package Information: https://launchpad.net/ubuntu/+source/libxml2/2.9.3+dfsg1-1ubuntu0.1 https://launchpad.net/ubuntu/+source/libxml2/2.9.2+zdfsg1-4ubuntu0.4 https://launchpad.net/ubuntu/+source/libxml2/2.9.1+dfsg1-3ubuntu4.8 https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-5.1ubuntu4.15 --