CVE-2017-13721
First published: Mon Oct 09 2017(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xorg-server | 2:1.20.4-1+deb10u4 2:1.20.4-1+deb10u9 2:1.20.11-1+deb11u6 2:21.1.7-3 2:21.1.8-1 | |
| X.Org Xserver | <=1.19.3 | |
| Debian | =8.0 | |
| Debian | =9.0 |
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Reference Links
- https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1
- https://security-tracker.debian.org/tracker/CVE-2017-13721
- 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://lists.x.org/archives/xorg-announce/2017-October/002808.html
- https://security.gentoo.org/glsa/201710-30
Frequently Asked Questions
What is the severity of CVE-2017-13721?
CVE-2017-13721 has a high severity rating due to its potential for causing X server aborts and malicious manipulation of shared memory segments.
How do I fix CVE-2017-13721?
To fix CVE-2017-13721, update the X.Org Server to a version that is 1.19.4 or higher, such as 2:1.20.4-1+deb10u4.
What systems are affected by CVE-2017-13721?
CVE-2017-13721 affects systems running X.Org Server versions prior to 1.19.4, specifically on Debian GNU/Linux 8.0 and 9.0.
Can CVE-2017-13721 be exploited remotely?
CVE-2017-13721 requires local access since the attacker must be authenticated to the X server to exploit the vulnerability.
What impact does CVE-2017-13721 have on users?
The impact of CVE-2017-13721 can lead to service disruptions as it allows an attacker to abort the X server or alter shared memory segments of other X clients.
- collector/security-tracker-debian
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- agent/author
- agent/weakness
- agent/references
- agent/description
- agent/first-publish-date
- agent/event
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/x.org
- canonical/x.org xserver
- version/x.org xserver/1.19.3
- vendor/debian
- canonical/debian
- version/debian/8.0
- version/debian/9.0