Description
khtml/imload/scaledimageplane.h in Konqueror in KDE 4.7.3 allows remote attackers to cause 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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | kdelibs +3 | 6:4.3.4-14.el6_3.2 | RHSA-2012:1416 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Konqueror 4.7.3 - Memory Corruption EDB-22406 · dos · Nov 1, 2012
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- RHSA-2012:1416 Red Hat Security Advisory: kdelibs security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 51145 third-party-advisory
- http://quickgit.kde.org/index.php?p=kdelibs.git&a=commitdiff&h=1f8b1b034ccf1713a5d123a4c327290f86d17d53
- RHSA-2012:1418 vendor-advisory
- RHSA-2012:1416 vendor-advisory
- 1027709 vdb-entry
- http://www.nth-dimension.org.uk/pub/NDSA20121010.txt.asc
- [oss-security] 20121011 Re: Pre-advisory for Konqueror 4.7.3 (other versions may be affected) mailing-list
- 20121030 Medium risk security flaws in Konqueror mailing-list
- [oss-security] 20121030 Medium risk security flaws in Konqueror mailing-list
- 51097 third-party-advisory