CVE-2008-5712

KDE Konqueror 3.5.9 - Denial of Service via Long HTML Color Attribute

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2008-5712. PoCs published by Jeremy Brown.

AI-analyzed exploit summary This exploit demonstrates a denial-of-service (DoS) vulnerability in KDE's Konqueror browser by generating HTML files with excessively long color attribute values, causing the browser to crash or hang.

Description

The HTML parser in KDE Konqueror 3.5.9 allows remote attackers to cause a denial of service (application crash) via (1) a long COLOR attribute in an HR element; or a long (a) BGCOLOR or (b) BORDERCOLOR attribute in a (2) TABLE, (3) TD, or (4) TR element. NOTE: the FONT vector is already covered by CVE-2008-4514.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Jeremy Brown · textdoslinux
https://www.exploit-db.com/exploits/6704

This exploit demonstrates a denial-of-service (DoS) vulnerability in KDE's Konqueror browser by generating HTML files with excessively long color attribute values, causing the browser to crash or hang.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: KDE Konqueror (versions affected by CVE-2008-5712)
No auth needed
Prerequisites: Access to a system with vulnerable KDE Konqueror browser · Ability to deliver malicious HTML files to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Jeremy Brown · textdoslinux
https://www.exploit-db.com/exploits/6689

The exploit demonstrates a denial-of-service (DoS) vulnerability in Konqueror 3.5.9 by crafting an HTML file with an excessively long color value, causing a crash due to an assertion failure in libX11. The PoC includes a Perl one-liner to generate the malicious HTML and a stack trace confirming the crash.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Konqueror 3.5.9
No auth needed
Prerequisites: Victim must open the crafted HTML file in Konqueror
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/47696
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/6704
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/4806

Scores

EPSS 0.0380
EPSS Percentile 88.6%

Details

CWE
CWE-20
Status published
Products (1)
kde/konqueror 3.5.9
Published Dec 24, 2008
Tracked Since Feb 18, 2026