CVEvulnerability
CVE-2017-2624
7.0 HIGH
Official page ↗
- Status
- Modified
- Published
- 2018-07-27
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 5.9 MEDIUM — CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- CVSS 3.0 ([email protected])
- 7.0 HIGH — CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 1.9 LOW — AV:L/AC:M/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-200, CWE-385
Description
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.
Affected configurations
• x.org x server (<= 1.19.4)
• debian debian linux 7.0
Related
References
- http://www.securityfocus.com/bid/96480 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037919 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2624 Exploit, Issue Tracking, Third Party Advisory
- https://gitlab.freedesktop.org/xorg/xserver/commit/d7ac755f0b618eb1259d93c8a16ec6e39a18627c Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html Third Party Advisory
- https://security.gentoo.org/glsa/201704-03 Third Party Advisory
- https://security.gentoo.org/glsa/201710-30 Third Party Advisory
- https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/ Exploit, Third Party Advisory
- http://www.securityfocus.com/bid/96480 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037919 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2624 Exploit, Issue Tracking, Third Party Advisory
- https://gitlab.freedesktop.org/xorg/xserver/commit/d7ac755f0b618eb1259d93c8a16ec6e39a18627c Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html Third Party Advisory
- https://security.gentoo.org/glsa/201704-03 Third Party Advisory
- https://security.gentoo.org/glsa/201710-30 Third Party Advisory
- https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/ Exploit, Third Party Advisory