Information Exposure Affecting xorg-server package, versions [,1.19.5)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.12% (48th percentile)

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  • Snyk IDSNYK-UNMANAGED-XORGSERVER-2371797
  • published26 Jan 2022
  • disclosed27 Jul 2018
  • creditUnknown

Introduced: 27 Jul 2018

CVE-2017-2624  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade xorg-server to version 1.19.5 or higher.

Overview

Affected versions of this package are vulnerable to Information Exposure. 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.

CVSS Scores

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