CVE-2016-5399

Publication date 22 July 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The bzread function in ext/bz2/bz2.c 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 (out-of-bounds write) or execute arbitrary code via a crafted bz2 archive.

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	Fixed 5.3.10-1ubuntu3.24
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

Notes

seth-arnold

PHP position seems to suggest they'll fix bzread() to ensure it conforms to the documented behaviour but they won't take any steps to 'safe' an improper use of API by applications. Since the API was apparently not honoured before I don't know how an application could be expected to be correct.

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=f3feddb5b45b5abd93abb1a95044b7e099d51c84
php7.0	Upstream: http://git.php.net/?p=php-src.git;a=commit;h=f3feddb5b45b5abd93abb1a95044b7e099d51c84

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3045-1
PHP vulnerabilities
2 August 2016