CVE-2015-8877

Publication date 21 May 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The gdImageScaleTwoPass function in gd_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.0, as used in PHP before 5.6.12, uses inconsistent allocate and free approaches, which allows remote attackers to cause a denial of service (memory consumption) via a crafted call, as demonstrated by a call to the PHP imagescale function.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libgd2	16.04 LTS xenial	Fixed 2.1.1-4ubuntu0.16.04.1
	15.10 wily	Fixed 2.1.1-4ubuntu0.15.10.1
	14.04 LTS trusty	Fixed 2.1.0-3ubuntu0.1
	12.04 LTS precise	Not affected
php5	16.04 LTS xenial	Not in release
	15.10 wily	Not affected
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not affected
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

mdeslaur

php uses the system libgd2

tyhicks

2.1.0-3, as shipped in Trusty, has quite a different implementation for gdImageScaleTwoPass() but I believe it is still affected

Patch details

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

Package	Patch details
libgd2	Upstream: 4751b60

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-2987-1
GD library vulnerabilities
31 May 2016