CVE-2014-3981

Severity: low (CVSS 3.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-06-08 · updated 2026-06-17
Weakness: CWE-59

Description

acinclude.m4, as used in the configure script in PHP 5.5.13 and earlier, allows local users to overwrite arbitrary files via a symlink attack on the /tmp/phpglibccheck file.

Affected products

PHP: before 5.3.29; from 5.4.0 before 5.4.30; from 5.5.0 before 5.5.14 — fixed in 5.3.29, 5.4.30, 5.5.14

How to fix

Upgrade to a fixed version: PHP 5.3.29, 5.4.30, 5.5.14. Check the vendor advisory for mitigations.

References

http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=91bcadd85e20e50d3f8c2e9721327681640e6f16
http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html
http://marc.info/?l=bugtraq&m=141017844705317&w=2
http://marc.info/?l=bugtraq&m=141390017113542&w=2
http://openwall.com/lists/oss-security/2014/06/06/12
http://seclists.org/fulldisclosure/2014/Jun/21
http://support.apple.com/kb/HT6443
http://www-01.ibm.com/support/docview.wss?uid=swg21683486
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
https://bugs.php.net/bug.php?id=67390
https://bugzilla.redhat.com/show_bug.cgi?id=1104978
https://support.apple.com/HT204659

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