CVE-2011-1471: php Numeric Errors
Vulnerability summary
CVE-2011-1471 is a medium (CVSS 4.3) Numeric Errors vulnerability in php. EPSS estimates a 13.19% chance of exploitation in the next 30 days, higher than 96.3% of scored vulnerabilities. 2 public exploits are recorded.
Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2Timeline
- 20-03-2011PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
Integer signedness error in zip_stream.c in the Zip extension in PHP before 5.3.6 allows context-dependent attackers to cause a denial of service (CPU consumption) via a malformed archive file that triggers errors in zip_fread function calls.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
13.19%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
No change 0.00 pp
From 13.19% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
2 foundExploit Reference (bugs.php.net)
Maturity: unknown
PHP < 5.3.6 'Zip' Extension - 'zip_fread()' Denial of Service
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.
Php1 product
- php< 5.2.11 | ≥ 5.3.0, < 5.3.6
1 vendor · 1 product
References
10 links- www.mandriva.com/security/advisories?name=MDVSA-2011:053Vendor AdvisoryX Refsource MANDRIVABroken Link
- lists.apple.com/archives/Security-announce/2011//Oct/msg00003.htmlVendor AdvisoryX Refsource APPLEMailing ListThird Party Advisory
- www.redhat.com/support/errata/RHSA-2011-1423.htmlVendor AdvisoryX Refsource REDHATThird Party Advisory
- www.mandriva.com/security/advisories?name=MDVSA-2011:052Vendor AdvisoryX Refsource MANDRIVABroken Link