CVE-2003-0166
Integer signedness error in emalloc() function for PHP before 4.3.2 allow remote attackers to cause a denial of service (memory…
- 7.5HighCVSS base score
- 14.1%Exploitation in 30 daysEPSS · top 3.4% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 3Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Integer signedness error in emalloc() function for PHP before 4.3.2 allow remote attackers to cause a denial of service (memory consumption) and possibly execute arbitrary code via negative arguments to functions such as (1) socket_recv, (2) socket_recvfrom, and possibly other functions.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 3 Exploit-DB entries for it.
Show the exploits3
Exploit-DB3 entries
- PHP 4.x - 'socket_recv()' Signed Integer Memory Corruption (Exploit-DB entry) (opens in a new tab)
EDB-ID 22425dos, phppublished 26 Mar 2003Verified
- PHP 4.x - 'socket_recvfrom()' Signed Integer Memory Corruption (Exploit-DB entry) (opens in a new tab)
EDB-ID 22426dos, phppublished 26 Mar 2003Verified
- PHP 4.3 - 'socket_iovec_alloc()' Integer Overflow (Exploit-DB entry) (opens in a new tab)
EDB-ID 22419dos, phppublished 25 Mar 2003Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 1 day later
· 1 day later
Published
- 21 years later
· 21 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 14.1% · top 3.4% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
6
- 20030402 Inaccurate Reports Concerning PHP Vulnerabilities (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- CLSA-2003:691 (opens in a new tab)vendor-advisoryx_refsource_CONECTIVAx_transferred
- 20030327 RE: FUD-ALARM: @(#)Mordred Labs advisory - Integer overflow in PHP memory allocator (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 7198 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20030326 @(#)Mordred Labs advisory - Integer overflow in PHP memory allocator (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 7197 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2003-0162 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2003-0166)Record last updated .