CVE-2017-2624

2017-03-0100:00:00

ubuntu.com

0.002 Low

EPSS

Percentile

51.6%

JSON

It was found that xorg-x11-server before 1.19.0 including uses memcmp() to
check the received MIT cookie against a series of valid cookies. If the
cookie is correct, it is allowed to attach to the Xorg session. Since most
memcmp() implementations return after an invalid byte is seen, this causes
a time difference between a valid and invalid byte, which could allow an
efficient brute force attack.

Bugs

<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856398>

Notes

Author	Note
tyhicks	1.19.0 and lower are affected

OSVersionArchitecturePackageVersionFilename
ubuntu14.04noarchxorg-server< 2:1.15.1-0ubuntu2.9UNKNOWN
ubuntu16.04noarchxorg-server< 2:1.18.4-0ubuntu0.3UNKNOWN
ubuntu16.04noarchxorg-server-hwe-16.04< 2:1.18.4-1ubuntu6.1~16.04.2UNKNOWN
ubuntu14.04noarchxorg-server-lts-xenial< 2:1.18.3-1ubuntu2.3~trusty2UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	14.04	noarch	xorg-server	< 2:1.15.1-0ubuntu2.9	UNKNOWN
ubuntu	16.04	noarch	xorg-server	< 2:1.18.4-0ubuntu0.3	UNKNOWN
ubuntu	16.04	noarch	xorg-server-hwe-16.04	< 2:1.18.4-1ubuntu6.1~16.04.2	UNKNOWN
ubuntu	14.04	noarch	xorg-server-lts-xenial	< 2:1.18.3-1ubuntu2.3~trusty2	UNKNOWN