What’s Vulnerable › Vulnerabilities

CVE-2003-0899

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 22.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2003-11-03 · updated 2026-06-16
• Weakness: CWE-131

Description

Buffer overflow in defang in libhttpd.c for thttpd 2.21 to 2.23b1 allows remote attackers to execute arbitrary code via requests that contain '<' or '>' characters, which trigger the overflow when the characters are expanded to "&lt;" and "&gt;" sequences.

Affected products

• thttpd: from 2.21 before 2.23; 2.23, 2.23-b1 — fixed in 2.23

How to fix

Upgrade to a fixed version: thttpd 2.23. Check the vendor advisory for mitigations.

References

• http://marc.info/?l=bugtraq&m=106729188224252&w=2
• http://secunia.com/advisories/10092
• http://www.osvdb.org/2729
• http://www.securityfocus.com/bid/8906
• http://www.texonet.com/advisories/TEXONET-20030908.txt
• https://exchange.xforce.ibmcloud.com/vulnerabilities/13530
• https://www.debian.org/security/2003/dsa-396
• http://marc.info/?l=bugtraq&m=106729188224252&w=2
• http://secunia.com/advisories/10092
• http://www.osvdb.org/2729
• http://www.securityfocus.com/bid/8906
• http://www.texonet.com/advisories/TEXONET-20030908.txt

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