Vulnerability CVE-2017-13721
Published: 2017-10-09   Modified: 2017-10-10

Description:
In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.

Type:

CWE-269

 (Improper Privilege Management)

CVSS2 => (AV:L/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
1.9/10
2.9/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
X.org -> Xorg-server 
Debian -> Debian linux 

 References:
http://www.debian.org/security/2017/dsa-4000
http://www.openwall.com/lists/oss-security/2017/10/04/10
http://www.securityfocus.com/bid/101238
https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1
https://lists.x.org/archives/xorg-announce/2017-October/002808.html
https://security.gentoo.org/glsa/201710-30
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