National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-2624 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.0 HIGH
Vector:  CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score: 5.9 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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Hyperlink Resource
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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-200 Information Exposure NIST  
CWE-385 Covert Timing Channel Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:x.org:xorg-server:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
1.19.4

Configuration 2 ( hide )
 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-2624
NVD Published Date:
07/27/2018
NVD Last Modified:
10/09/2019