CVE-2016-6296

Publication date 25 July 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Integer signedness error in the simplestring_addn function in simplestring.c in xmlrpc-epi through 0.54.2, as used in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a long first argument to the PHP xmlrpc_encode_request function.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
php7.0	16.04 LTS xenial	Fixed 7.0.8-0ubuntu0.16.04.2
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
xmlrpc-epi	16.04 LTS xenial	Fixed 0.54.2-1.1ubuntu0.1
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Fixed 0.54.2-1+deb7u1ubuntu0.14.04.2
	12.04 LTS precise	Fixed 0.54.2-1+deb7u1ubuntu0.12.04.1
php5	16.04 LTS xenial	Not in release
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Fixed 5.5.9+dfsg-1ubuntu4.19
	12.04 LTS precise	Fixed 5.3.10-1ubuntu3.24

Patch details

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

Package	Patch details
php7.0	Upstream: http://git.php.net/?p=php-src.git;a=commit;h=e6c48213c22ed50b2b987b479fcc1ac709394caa
php5	Upstream: http://git.php.net/?p=php-src.git;a=commit;h=e6c48213c22ed50b2b987b479fcc1ac709394caa

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-3045-1
PHP vulnerabilities
2 August 2016

USN-3059-1
xmlrpc-epi vulnerability
10 August 2016

Other references

https://www.cve.org/CVERecord?id=CVE-2016-6296