[SECURITY] [DSA 3323-1] icu security update

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Debian Security Advisory DSA-3323-1 security@debian.org
https://www.debian.org/security/ Laszlo Boszormenyi
August 01, 2015 https://www.debian.org/security/faq
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Package : icu
CVE ID : CVE-2014-6585 CVE-2014-8146 CVE-2014-8147 CVE-2015-4760
Debian Bug : 778511 784773

Several vulnerabilities were discovered in the International Components
for Unicode (ICU) library.

CVE-2014-8146

The Unicode Bidirectional Algorithm implementation does not properly
track directionally isolated pieces of text, which allows remote
attackers to cause a denial of service (heap-based buffer overflow)
or possibly execute arbitrary code via crafted text.

CVE-2014-8147

The Unicode Bidirectional Algorithm implementation uses an integer
data type that is inconsistent with a header file, which allows
remote attackers to cause a denial of service (incorrect malloc
followed by invalid free) or possibly execute arbitrary code via
crafted text.

CVE-2015-4760

The Layout Engine was missing multiple boundary checks. These could
lead to buffer overflows and memory corruption. A specially crafted
file could cause an application using ICU to parse untrusted font
files to crash and, possibly, execute arbitrary code.

Additionally, it was discovered that the patch applied to ICU in DSA-3187-1
for CVE-2014-6585 was incomplete, possibly leading to an invalid memory
access. This could allow remote attackers to disclose portion of private
memory via crafted font files.

For the oldstable distribution (wheezy), these problems have been fixed
in version 4.8.1.1-12+deb7u3.

For the stable distribution (jessie), these problems have been fixed in
version 52.1-8+deb8u2.

For the testing distribution (stretch), these problems have been fixed
in version 52.1-10.

For the unstable distribution (sid), these problems have been fixed in
version 52.1-10.

We recommend that you upgrade your icu packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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