Gentoo: GLSA-201206-15: libpng: Multiple vulnerabilities
Summary
Multiple vulnerabilities have been discovered in libpng:
* The "embedded_profile_len()" function in pngwutil.c does not check
for negative values, resulting in a memory leak (CVE-2009-5063).
* The "png_format_buffer()" function in pngerror.c contains an
off-by-one error (CVE-2011-2501).
* The "png_rgb_to_gray()" function in pngrtran.c contains an integer
overflow error (CVE-2011-2690).
* The "png_err()" function in pngerror.c contains a NULL pointer
dereference error (CVE-2011-2691).
* The "png_handle_sCAL()" function in pngrutil.c improperly handles
malformed sCAL chunks(CVE-2011-2692).
* The "png_decompress_chunk()" function in pngrutil.c contains an
integer overflow error (CVE-2011-3026).
* The "png_inflate()" function in pngrutil.c contains and out of bounds
error (CVE-2011-3045).
* The "png_set_text_2()" function in pngset.c contains an error which
could result in memory corruption (CVE-2011-3048).
* The "png_formatted_warning()" function in pngerror.c contains an
off-by-one error (CVE-2011-3464).
Resolution
All libpng 1.5 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.5.10"
All libpng 1.2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.49"
Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying some of these
packages.
References
[ 1 ] CVE-2009-5063 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-5063 [ 2 ] CVE-2011-2501 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2501 [ 3 ] CVE-2011-2690 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2690 [ 4 ] CVE-2011-2691 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2691 [ 5 ] CVE-2011-2692 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2692 [ 6 ] CVE-2011-3026 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3026 [ 7 ] CVE-2011-3045 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3045 [ 8 ] CVE-2011-3048 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3048 [ 9 ] CVE-2011-3464 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3464
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201206-15
Concerns
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
Synopsis
Multiple vulnerabilities in libpng might allow remote attackers to execute arbitrary code or cause a Denial of Service condition.
Background
libpng is a standard library used to process PNG (Portable Network Graphics) images. It is used by several programs, including web browsers and potentially server processes.
Affected Packages
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-libs/libpng < 1.5.10 >= 1.5.10 *>= 1.2.49
Impact
===== An attacker could exploit these vulnerabilities to execute arbitrary code with the permissions of the user running the vulnerable program, which could be the root user, or to cause programs linked against the library to crash.
Workaround
There is no known workaround at this time.
