CVE-2016-5769

Publication date 24 June 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

Multiple integer overflows in mcrypt.c in the mcrypt extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 allow remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted length value, related to the (1) mcrypt_generic and (2) mdecrypt_generic functions.

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
	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 7.0.8-0ubuntu0.16.04.1
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release

Notes

seth-arnold

The fix relies upon signed multiplication turning into negative numbers. Since this is undefined in C, the fix doesn't feel complete or or correct to me.

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=6c5211a0cef0cc2854eaa387e0eb036e012904d0
php7.0	Upstream: http://git.php.net/?p=php-src.git;a=commit;h=6c5211a0cef0cc2854eaa387e0eb036e012904d0

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