CVE-2003-0899
Buffer overflow in defang in libhttpd.c for thttpd 2.21 to 2.23b1 allows remote attackers to...
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 "<" and ">" sequences.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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 "<" and ">" sequences.
- Record
CVE-2003-0899- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-131
- Updated
- 2026-11-02
CVE List No score
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 "<" and ">" sequences.
- Record
CVE-2003-0899- Updated
- 2026-11-02
EUVDEUVD-2003-0889 No score
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 "<" and ">" sequences.
- Record
EUVD-2003-0889- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-28q9-rp4x-j7g7
Buffer overflow in defang in libhttpd.c for thttpd 2.21 to 2.23b1 allows remote attackers to...
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 "<" and ">" sequences.
- Record
GHSA-28q9-rp4x-j7g7- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119, CWE-131
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
thttpdDebian:3.0 From an advisory covering 2 CVEs |
before 2.21b-11.2 | 2.21b-11.2 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | thttpd 2.2x - 'defang' Remote Buffer Overflow (PoC) | 2003-10-27 |
| Exploit-DB | thttpd 2.2x - 'defang' Remote Buffer Overflow | 2003-10-27 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2003-0899 is a critical vulnerability (CVSS 9.8) in Acme Thttpd, published October 29, 2003. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 22.2%, the 97th percentile. No source names a fixed version.
References
securityfocus.com/bid/8906
debian.org/security/2003/dsa-396
secunia.com/advisories/10092
osvdb.org/2729
texonet.com/advisories/TEXONET-20030908.txt
marc.info?l=bugtraq&m=106729188224252&w=2
exchange.xforce.ibmcloud.com/vulnerabilities/13530
nvd.nist.gov/vuln/detail/CVE-2003-0899
github.com/advisories/GHSA-28q9-rp4x-j7g7