CVE-2012-4512

HIGH

KDE Konqueror - Denial of Service and Memory Disclosure via CSS Font Face Source Type Confusion

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2012-4512.

AI-analyzed exploit summary This advisory details four memory corruption vulnerabilities in Konqueror 4.7.3, including type confusion, out-of-bounds access, NULL pointer dereference, and use-after-free flaws. It provides technical analysis, patch references, and proof-of-concept code snippets for each vulnerability.

Description

The CSS parser (khtml/css/cssparser.cpp) in Konqueror in KDE 4.7.3 allows remote attackers to cause a denial of service (crash) and possibly read memory via a crafted font face source, related to "type confusion."

Exploits (1)

exploitdb WRITEUP
doslinux
https://www.exploit-db.com/exploits/22406

This advisory details four memory corruption vulnerabilities in Konqueror 4.7.3, including type confusion, out-of-bounds access, NULL pointer dereference, and use-after-free flaws. It provides technical analysis, patch references, and proof-of-concept code snippets for each vulnerability.

Classification
Writeup 100%
Attack Type
Dos | Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Konqueror 4.7.3
No auth needed
Prerequisites: Victim must visit a malicious webpage or interact with crafted HTML/JavaScript content.
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (11)

Core 11
Core References
Third Party Advisory x_refsource_misc
http://www.nth-dimension.org.uk/pub/NDSA20121010.txt.asc
Exploit, Third Party Advisory x_refsource_misc
http://em386.blogspot.com/2010/12/webkit-css-type-confusion.html
Broken Link, Third Party Advisory x_refsource_misc
http://archives.neohapsis.com/archives/bugtraq/2012-11/0005.html
Mailing List, Third Party Advisory x_refsource_misc
http://www.openwall.com/lists/oss-security/2012/10/11/11
Mailing List, Third Party Advisory x_refsource_misc
http://www.openwall.com/lists/oss-security/2012/10/30/6
Third Party Advisory x_refsource_misc
http://rhn.redhat.com/errata/RHSA-2012-1416.html
Third Party Advisory x_refsource_misc
http://rhn.redhat.com/errata/RHSA-2012-1418.html
Third Party Advisory, VDB Entry x_refsource_misc
http://www.securitytracker.com/id?1027709
Not Applicable, Third Party Advisory x_refsource_misc
http://secunia.com/advisories/51097
Not Applicable, Third Party Advisory x_refsource_misc
http://secunia.com/advisories/51145

Scores

CVSS v3 8.8
EPSS 0.1166
EPSS Percentile 95.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-843
Status published
Products (5)
kde/kde 4.7.3
redhat/enterprise_linux 6.0
redhat/enterprise_linux_desktop 6.0
redhat/enterprise_linux_server_eus 6.3
redhat/enterprise_linux_workstation 6.0
Published Feb 08, 2020
Tracked Since Feb 18, 2026