CVE-2013-3735
No exploitation reported by the sources we read.
- Published2013-05-31
- WeaknessCWE-20
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The Zend Engine in PHP before 5.4.16 RC1, and 5.5.0 before RC2, does not properly determine whether a parser error occurred, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash) via a crafted function definition, as demonstrated by an attack within a shared web-hosting environment. NOTE: the vendor's http://php.net/security-note.php page says "for critical security situations you should be using OS-level security by running multiple web servers each as their own user id.
Timeline
dates in UTC- 2013-05-3121:55CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2013-3735?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2013-3735?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.4 | ≤ 5.4.15 | no fix published | NVD |
| 5.4 | = 5.4.0 | no fix published | NVD |
| 5.4 | = 5.4.1 | no fix published | NVD |
| 5.4 | = 5.4.2 | no fix published | NVD |
| 5.4 | = 5.4.3 | no fix published | NVD |
| 5.4 | = 5.4.4 | no fix published | NVD |
| 5.4 | = 5.4.5 | no fix published | NVD |
| 5.4 | = 5.4.6 | no fix published | NVD |
| 5.4 | = 5.4.7 | no fix published | NVD |
| 5.4 | = 5.4.8 | no fix published | NVD |
| 5.4 | = 5.4.9 | no fix published | NVD |
| 5.4 | = 5.4.10 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CISA-ADPCVSS 3.17.52025-01-16
- NVDCVSS 2.05read 2026-10-23
- NVDweakness (CWE)CWE-20read 2026-10-23
- FIRST EPSSEPSS score2.8 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2013-05-31
- Last Modified
- 2026-06-16
- NVD status
- Modified
Frequently asked questions
What is CVE-2013-3735?
Is CVE-2013-3735 actively exploited?
What is the CVSS score for CVE-2013-3735?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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