CVE-2011-1471

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-03-20 · updated 2026-06-16
Weakness: CWE-189

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.

Affected products

PHP: before 5.2.11; from 5.3.0 before 5.3.6 — fixed in 5.2.11, 5.3.6

How to fix

Upgrade to a fixed version: PHP 5.2.11, 5.3.6. Check the vendor advisory for mitigations.

References

http://bugs.php.net/bug.php?id=49072
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
http://support.apple.com/kb/HT5002
http://www.debian.org/security/2011/dsa-2266
http://www.mandriva.com/security/advisories?name=MDVSA-2011:052
http://www.mandriva.com/security/advisories?name=MDVSA-2011:053
http://www.php.net/ChangeLog-5.php
http://www.redhat.com/support/errata/RHSA-2011-1423.html
http://www.securityfocus.com/bid/46975
http://www.vupen.com/english/advisories/2011/0744
http://bugs.php.net/bug.php?id=49072
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html

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