#VU44883 NULL pointer dereference in libpng - CVE-2011-2691
Vulnerability identifier: #VU44883
Vulnerability risk: Medium
CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-476
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 perform a denial of service (DoS) attack.
The png_err function in pngerror.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 makes a function call using a NULL pointer argument instead of an empty-string argument, which allows remote attackers to cause a denial of service (application crash) via a crafted PNG image.
Mitigation
Install update from vendor's website.
Vulnerable software versions
libpng: 1.5.0 - 1.5.3
External links
https://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng;a=commit;h=9dad5e37aef295b4ef8dea39392b652deebc9261
https://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
https://marc.info/?l=bugtraq&m=133951357207000&w=2
https://secunia.com/advisories/45046
https://secunia.com/advisories/45405
https://secunia.com/advisories/45492
https://secunia.com/advisories/49660
https://security.gentoo.org/glsa/glsa-201206-15.xml
https://support.apple.com/kb/HT5002
https://www.debian.org/security/2011/dsa-2287
https://www.libpng.org/pub/png/libpng.html
https://www.mandriva.com/security/advisories?name=MDVSA-2011:151
https://www.openwall.com/lists/oss-security/2011/07/13/2
https://www.securityfocus.com/bid/48660
https://bugzilla.redhat.com/show_bug.cgi?id=720608
https://exchange.xforce.ibmcloud.com/vulnerabilities/68537
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.
