CVE-2017-2624

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Summary

CVECVE-2017-2624
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-07-27 18:29:00 UTC
Updated2019-10-09 23:26:00 UTC
DescriptionIt 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.

Risk And Classification

Problem Types: CWE-200

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 7.0 All All All
Operating System Debian Debian Linux 7.0 All All All
Application X.org Xorg-server All All All All

References

ReferenceSourceLinkTags
X.org X Server Local Multiple Security Vulnerabilities BID www.securityfocus.com Third Party Advisory, VDB Entry
X Multiple Flaws Let Local Users Conduct Timing and Key Guessing Attacks Obtain Elevated Privileges - SecurityTracker SECTRACK www.securitytracker.com Third Party Advisory, VDB Entry
Advisory X41-2017-001: Multiple Vulnerabilities in X.org - X41 D-SEC GmbH MISC www.x41-dsec.de Exploit, Third Party Advisory
Use timingsafe_memcmp() to compare MIT-MAGIC-COOKIES CVE-2017-2624 (d7ac755f) · Commits · xorg / xserver · GitLab CONFIRM gitlab.freedesktop.org Patch, Third Party Advisory
[SECURITY] [DLA 1186-1] xorg-server security update MLIST lists.debian.org Third Party Advisory
X.Org: Multiple vulnerabilities (GLSA 201704-03) — Gentoo Security GENTOO security.gentoo.org Third Party Advisory
X.Org Server: Multiple vulnerabilities (GLSA 201710-30) — Gentoo Security GENTOO security.gentoo.org Third Party Advisory
1424984 – (CVE-2017-2624) CVE-2017-2624 xorg-x11-server: timing attack against MIT Cookie CONFIRM bugzilla.redhat.com Exploit, Issue Tracking, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 710339 Gentoo Linux X.Org Multiple Vulnerabilities (GLSA 201704-03)
  • 710562 Gentoo Linux X.Org Server Multiple Vulnerabilities (GLSA 201710-30)
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