Medium severity · published Oct 10, 2017
CVE-2017-13721
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…
4.7
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
XS
X Server · X.org
through 1.19.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-13721
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-13721
Third Party Advisory
http://www.debian.org/security/2017/dsa-4000
Mailing List
http://www.openwall.com/lists/oss-security/2017/10/04/10
Third Party Advisory
http://www.securityfocus.com/bid/101238
Third Party Advisory
https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1
Vendor Advisory
https://lists.x.org/archives/xorg-announce/2017-October/002808.html
Third Party Advisory
https://security.gentoo.org/glsa/201710-30
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