CVE-2008-4514

KDE Konqueror 3.5.9 - Denial of Service via Long Font Color Value

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2008-4514. PoCs published by Jeremy Brown.

AI-analyzed exploit summary 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.

Description

The HTML parser in KDE Konqueror 3.5.9 allows remote attackers to cause a denial of service (application crash) via a font tag with a long color value, which triggers an assertion error.

Exploits (2)

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 →
exploitdb WORKING POC
doslinux
https://www.exploit-db.com/exploits/6704

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

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: KDE Konqueror (versions affected by CVE-2008-4514)
No auth needed
Prerequisites: Victim must open the malicious HTML file in Konqueror
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/6689
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/4394
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/31605

Scores

EPSS 0.0774
EPSS Percentile 93.8%

Details

CWE
CWE-20
Status published
Products (1)
konqueror/konqueror 3.5.9
Published Oct 09, 2008
Tracked Since Feb 18, 2026