#VU43345 Out-of-bounds read in KDE - CVE-2012-4513

Vulnerability identifier: #VU43345

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2012-4513

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
KDE
Other software / Other software solutions

Vendor: KDE.org

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in khtml/imload/scaledimageplane.h in Konqueror in KDE 4.7.3. A remote attacker can perform a denial of service (crash) and possibly read memory via large canvas dimensions, which leads to an unexpected sign extension and a heap-based buffer over-read.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

KDE: 4.7.3

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External links
https://archives.neohapsis.com/archives/bugtraq/2012-11/0005.html
https://quickgit.kde.org/index.php?p=kdelibs.git&a=commitdiff&h=1f8b1b034ccf1713a5d123a4c327290f86d17d53
https://rhn.redhat.com/errata/RHSA-2012-1416.html
https://rhn.redhat.com/errata/RHSA-2012-1418.html
https://secunia.com/advisories/51097
https://secunia.com/advisories/51145
https://www.nth-dimension.org.uk/pub/NDSA20121010.txt.asc
https://www.openwall.com/lists/oss-security/2012/10/11/11
https://www.openwall.com/lists/oss-security/2012/10/30/6
https://www.securitytracker.com/id?1027709

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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. However, proof of concept for this vulnerability is available.