CVE-2016-5771

Publication date 24 June 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

spl_array.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and application crash) via crafted serialized data.

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	Ignored end of life
	14.04 LTS trusty	Fixed 5.5.9+dfsg-1ubuntu4.19
	12.04 LTS precise	Ignored
php7.0	16.04 LTS xenial	Not affected
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release

Notes

seth-arnold

Applications should never deserialize unauthenticated data.

mdeslaur

does not affect 7.0.x precise needs backported fix we will not be fixing this in Ubuntu 12.04 LTS. We recommend validating untrusted data before unserializing.

Patch details

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

Package	Patch details
php5	Upstream: http://git.php.net/?p=php-src.git;a=commit;h=3f627e580acfdaf0595ae3b115b8bec677f203ee

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H