CVE-2016-4540

Publication date 6 May 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The grapheme_stripos function in ext/intl/grapheme/grapheme_string.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a negative offset.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
php5	16.04 LTS xenial	Not in release
	15.10 wily	Fixed 5.6.11+dfsg-1ubuntu3.4
	14.04 LTS trusty	Fixed 5.5.9+dfsg-1ubuntu4.17
	12.04 LTS precise	Fixed 5.3.10-1ubuntu3.23
php7.0	16.04 LTS xenial	Fixed 7.0.4-7ubuntu2.1
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release

Notes

sbeattie

Fixed in 7.0.6, 5.6.21, 5.5.35

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
php5	Upstream: https://git.php.net/?p=php-src.git;a=commit;h=fd9689745c44341b1bd6af4756f324be8abba2fb
php7.0	Upstream: https://git.php.net/?p=php-src.git;a=commit;h=fd9689745c44341b1bd6af4756f324be8abba2fb

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-2984-1
PHP vulnerabilities
24 May 2016