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Fencer Intel
medium 6.4

CVE-2012-4513 json

khtml/imload/scaledimageplane.h in Konqueror in KDE 4.7.3 allows remote attackers to cause a denial of service (crash) and possibly read me…

published 2012-11-11 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4442

cvss
6.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
12.6%
EPSS 12.6% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • kdelibs RHEL 6 6:4.3.4-14.el6_3.2
  • kdelibs-common RHEL 6 6:4.3.4-14.el6_3.2
  • kdelibs-apidocs RHEL 6 6:4.3.4-14.el6_3.2

red hat advisories RHSA-2012:1416

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-4513 updated cvss 5.8

kdelibs: Heap-based buffer over-read when calculating dimensions of the canvas within the scale loop

  • Red Hat Enterprise Linux Desktop (v. 6) kdelibs 4.3.4-14.el6_3.2, kdelibs-common 4.3.4-14.el6_3.2 Red Hat Enterprise Linux Desktop Optional (v. 6) kdelibs 4.3.4-14.el6_3.2, kdelibs-apidocs 4.3.4-14.el6_3.2
    fixed: vendor fix RHSA-2012:1416
  • Red Hat Enterprise Linux HPC Node (v. 6)
    fixed: vendor fix RHSA-2012:1418
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) kdelibs 4.3.4-14.el6_3.2, kdelibs-common 4.3.4-14.el6_3.2, kdelibs-apidocs 4.3.4-14.el6_3.2 Red Hat Enterprise Linux Server (v. 6) kdelibs 4.3.4-14.el6_3.2, kdelibs-common 4.3.4-14.el6_3.2, kdelibs-apidocs 4.3.4-14.el6_3.2 Red Hat Enterprise Linux Workstation (v. 6) kdelibs 4.3.4-14.el6_3.2, kdelibs-common 4.3.4-14.el6_3.2, kdelibs-apidocs 4.3.4-14.el6_3.2
    fixed: vendor fix RHSA-2012:1416
  • Red Hat Enterprise Linux 5 kdelibs
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-22406)
  2. Published

Exploit prediction

12.60% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-22406 Konqueror 4.7.3 - Memory Corruption dos, 2012-11-01
  • nth-dimension.org.uk http://www.nth-dimension.org.uk/pub/NDSA20121010.txt.asc referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.