Ubuntu Essential and Critical Security Patch Updates - Page 383

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Ubuntu: Samba vulnerability USN-702-1

Ubuntu: Samba vulnerability USN-702-1

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Alin Rad Pop discovered that Samba did not correctly check the size of reply packets to mailslot requests. If a server was configured with domain logon enabled, an unauthenticated remote attacker could send a specially crafted domain logon packet and execute arbitrary code or crash the Samba service. By default, domain logon is disabled in Ubuntu.

Ubuntu: Cairo regression

Ubuntu: Cairo regression

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USN-550-1 fixed vulnerabilities in Cairo. A bug in font glyph rendering was uncovered as a result of the new memory allocation routines. In certain situations, fonts containing characters with no width or height would not render any more. This update fixes the problem. We apologize for the inconvenience.

Ubuntu: Cairo regression USN-550-2

Ubuntu: Cairo regression USN-550-2

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Peter Valchev discovered that Cairo did not correctly decode PNG image data. By tricking a user or automated system into processing a specially crafted PNG with Cairo, a remote attacker could execute arbitrary code with user privileges.

Ubuntu: e2fsprogs vulnerability

Ubuntu: e2fsprogs vulnerability

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Rafal Wojtczuk discovered multiple integer overflows in e2fsprogs. If a user or automated system were tricked into fscking a malicious ext2/ext3 filesystem, a remote attacker could execute arbitrary code with the user's privileges.

Ubuntu: Mono vulnerability

Ubuntu: Mono vulnerability

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It was discovered that Mono did not correctly bounds check certain BigInteger actions. Remote attackers could exploit this to crash a Mono application or possibly execute arbitrary code with user privileges.

Ubuntu: Perl vulnerability

Ubuntu: Perl vulnerability

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It was discovered that Perl's regular expression library did not correctly handle certain UTF sequences. If a user or automated system were tricked into running a specially crafted regular expression, a remote attacker could crash the application or possibly execute arbitrary code with user privileges.

Ubuntu: Cairo vulnerability

Ubuntu: Cairo vulnerability

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Peter Valchev discovered that Cairo did not correctly decode PNG image data. By tricking a user or automated system into processing a specially crafted PNG with Cairo, a remote attacker could execute arbitrary code with user privileges.

Ubuntu: PCRE vulnerabilities

Ubuntu: PCRE vulnerabilities

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Tavis Ormandy and Will Drewry discovered multiple flaws in the regular expression handling of PCRE. By tricking a user or service into running specially crafted expressions via applications linked against libpcre3, a remote attacker could crash the application, monopolize CPU resources, or possibly execute arbitrary code with the application's privileges.

Ubuntu: link-grammar vulnerability

Ubuntu: link-grammar vulnerability

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Alin Rad Pop discovered that AbiWord's Link Grammar parser did not correctly handle overly-long words. If a user were tricked into opening a specially crafted document, AbiWord, or other applications using Link Grammar, could be made to crash.

Ubuntu: poppler vulnerabilities

Ubuntu: poppler vulnerabilities

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Secunia Research discovered several vulnerabilities in poppler. If a user were tricked into loading a specially crafted PDF file, a remote attacker could cause a denial of service or possibly execute arbitrary code with the user's privileges in applications linked against poppler.

Ubuntu: Emacs vulnerability

Ubuntu: Emacs vulnerability

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Drake Wilson discovered that Emacs did not correctly handle the safe mode of "enable-local-variables". If a user were tricked into opening a specially crafted file while "enable-local-variables" was set to the non-default ":safe", a remote attacker could execute arbitrary commands with the user's privileges.

Ubuntu: flac vulnerability

Ubuntu: flac vulnerability

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Sean de Regge discovered that flac did not properly perform bounds checking in many situations. An attacker could send a specially crafted FLAC audio file and execute arbitrary code as the user or cause a denial of service in flac or applications that link against flac.

Ubuntu: CUPS vulnerability USN-539-1

Ubuntu: CUPS vulnerability USN-539-1

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Alin Rad Pop discovered that CUPS did not correctly validate buffer lengths when processing IPP tags. Remote attackers successfully exploiting this vulnerability would gain access to the non-root CUPS user in Ubuntu 6.06 LTS, 6.10, and 7.04. In Ubuntu 7.10, attackers would be isolated by the AppArmor CUPS profile.

Ubuntu: Compiz vulnerability

Ubuntu: Compiz vulnerability

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USN-537-1 fixed vulnerabilities in gnome-screensaver. The fixes were incomplete, and only reduced the scope of the vulnerability, without fully solving it. This update fixes related problems in compiz. Original advisory details: Jens Askengren discovered that gnome-screensaver became confused when running under Compiz, and could lose keyboard lock focus. A local attacker could exploit this to bypass the user's locked screen saver.

Ubuntu: libpng vulnerabilities

Ubuntu: libpng vulnerabilities

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It was discovered that libpng did not properly perform bounds checking and comparisons in certain operations. An attacker could send a specially crafted PNG image and cause a denial of service in applications linked against libpng.

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