CVE-2017-13721

low-risk
Published 2017-10-10

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.

Do I need to act?

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0.09% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
LOCAL / HIGH complexity

Affected Products (3)

Affected Vendors

X.Org Debian

References (12)

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=b95f25af141d33a65f6f821ea9c...
Vendor Advisory https://lists.x.org/archives/xorg-announce/2017-October/002808.html
Third Party Advisory https://security.gentoo.org/glsa/201710-30
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=b95f25af141d33a65f6f821ea9c...
Vendor Advisory https://lists.x.org/archives/xorg-announce/2017-October/002808.html
Third Party Advisory https://security.gentoo.org/glsa/201710-30
21
/ 100
low-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 9/34 · Low