Vulnerability identifier: #VU44884

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-2692

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libpng
Universal components / Libraries / Libraries used by multiple products

Vendor: libpng

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libpng: 1.5.0 - 1.5.3

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External links
http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng;a=commit;h=61a2d8a2a7b03023e63eae9a3e64607aaaa6d339
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
http://secunia.com/advisories/45046
http://secunia.com/advisories/45405
http://secunia.com/advisories/45415
http://secunia.com/advisories/45445
http://secunia.com/advisories/45460
http://secunia.com/advisories/45461
http://secunia.com/advisories/45492
http://secunia.com/advisories/49660
http://security.gentoo.org/glsa/glsa-201206-15.xml
http://sourceforge.net/mailarchive/forum.php?thread_name=003101cc2790%24fb5d6e80%24f2184b80%24%40acm.org&forum_name=png-mng-implement
http://support.apple.com/kb/HT5002
http://support.apple.com/kb/HT5281
http://www.debian.org/security/2011/dsa-2287
http://www.kb.cert.org/vuls/id/819894
http://www.libpng.org/pub/png/libpng.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:151
http://www.openwall.com/lists/oss-security/2011/07/13/2
http://www.redhat.com/support/errata/RHSA-2011-1103.html
http://www.redhat.com/support/errata/RHSA-2011-1104.html
http://www.redhat.com/support/errata/RHSA-2011-1105.html
http://www.securityfocus.com/bid/48618
http://www.ubuntu.com/usn/USN-1175-1
http://bugzilla.redhat.com/show_bug.cgi?id=720612
http://exchange.xforce.ibmcloud.com/vulnerabilities/68536

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.