CVE-2017-13723
published 2017-10-10CVE-2017-13723: In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of…
PriorityP335high7.8CVSS 3.0
AVLACLPRLUINSUCHIHAH
EPSS
0.44%
36.3th percentile
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | xorg-server | < xorg-server 2:1.19.4-1 (bookworm) | xorg-server 2:1.19.4-1 (bookworm) |
| x.org | x_server | <= 1.19.3 | — |
| x.org | xorg-server | >= 0 < 2:1.19.4-1 | 2:1.19.4-1 |
| x.org | xorg-server | >= 0 < 2:1.19.4-1 | 2:1.19.4-1 |
| x.org | xorg-server | >= 0 < 2:1.19.4-1 | 2:1.19.4-1 |
| x.org | xorg-server | >= 0 < 2:1.19.4-1 | 2:1.19.4-1 |
| x.org | xorg-server | >= 0 < 2:1.15.1-0ubuntu2.10 | 2:1.15.1-0ubuntu2.10 |
| x.org | xorg-server | >= 0 < 2:1.18.4-0ubuntu0.6 | 2:1.18.4-0ubuntu0.6 |
CVSS provenance
nvdv3.07.8HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu4.7MEDIUM
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Ubuntu
X.Org X server vulnerabilities
vendor_ubuntu·2017-10-12·CVSS 4.7
CVE-2017-13721 [MEDIUM] X.Org X server vulnerabilities
Title: X.Org X server vulnerabilities
Summary: Several security issues were fixed in the X.Org X server.
Michal Srb discovered that the X.Org X server incorrectly handled shared
memory segments. An attacker able to connect to an X server, either locally
or remotely, could use this issue to crash the server, or possibly replace
shared memory segments of other X clients in the same session.
(CVE-2017-13721)
Michal Srb discovered that the X.Org X server incorrectly handled XKB
buffers. An attacker able to connect to an X server, either locally or
remotely, could use this issue to crash the server, or possibly execute
arbitrary code. (CVE-2017-13723)
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
Red Hat
xorg-x11-server: Global buffer overflow in xkbtext.c
vendor_redhat·2017-10-04·CVSS 7.8
CVE-2017-13723 [HIGH] CWE-119 xorg-x11-server: Global buffer overflow in xkbtext.c
xorg-x11-server: Global buffer overflow in xkbtext.c
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
Package: xorg-x11-server (Red Hat Enterprise Linux 5) - Will not fix
Package: xorg-x11-server (Red Hat Enterprise Linux 6) - Will not fix
Package: xorg-x11-server (Red Hat Enterprise Linux 7) - Will not fix
Package: xorg-x11-server (Red Hat Enterprise Linux 9) - Not affected
Debian
CVE-2017-13723: xorg-server - In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker au...
vendor_debian·2017·CVSS 7.8
CVE-2017-13723 [HIGH] CVE-2017-13723: xorg-server - In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker au...
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
Scope: local
bookworm: resolved (fixed in 2:1.19.4-1)
bullseye: resolved (fixed in 2:1.19.4-1)
forky: resolved (fixed in 2:1.19.4-1)
sid: resolved (fixed in 2:1.19.4-1)
trixie: resolved (fixed in 2:1.19.4-1)
GHSA
GHSA-w3w2-h9f5-hrg7: In X
ghsa_unreviewed·2022-05-14
CVE-2017-13723 [HIGH] CWE-119 GHSA-w3w2-h9f5-hrg7: In X
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
OSV
xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities
osv·2017-10-12·CVSS 4.7
CVE-2017-13721 [MEDIUM] xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities
xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities
Michal Srb discovered that the X.Org X server incorrectly handled shared
memory segments. An attacker able to connect to an X server, either locally
or remotely, could use this issue to crash the server, or possibly replace
shared memory segments of other X clients in the same session.
(CVE-2017-13721)
Michal Srb discovered that the X.Org X server incorrectly handled XKB
buffers. An attacker able to connect to an X server, either locally or
remotely, could use this issue to crash the server, or possibly execute
arbitrary code. (CVE-2017-13723)
OSV
CVE-2017-13723: In X
osv·2017-10-10·CVSS 7.8
CVE-2017-13723 [HIGH] CVE-2017-13723: In X
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2017-13721 CVE-2017-13723 xorg-x11-server: various flaws [fedora-all]
bugzilla·2017-10-10·CVSS 4.7
CVE-2017-13721 [MEDIUM] CVE-2017-13721 CVE-2017-13723 xorg-x11-server: various flaws [fedora-all]
CVE-2017-13721 CVE-2017-13723 xorg-x11-server: various flaws [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of
Bugzilla
CVE-2017-13723 xorg-x11-server: Global buffer overflow in xkbtext.c
bugzilla·2017-10-10·CVSS 7.8
CVE-2017-13723 [HIGH] CVE-2017-13723 xorg-x11-server: Global buffer overflow in xkbtext.c
CVE-2017-13723 xorg-x11-server: Global buffer overflow in xkbtext.c
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
References:
http://www.openwall.com/lists/oss-security/2017/10/04/10
https://lists.x.org/archives/xorg-announce/2017-October/002808.html
Upstream patch:
https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76ac
Discussion:
Created xorg-x11-server tracking bugs for this issue:
Affects: fedora-all [bug 1500389]
http://www.debian.org/security/2017/dsa-4000http://www.openwall.com/lists/oss-security/2017/10/04/10http://www.securityfocus.com/bid/101253https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76achttps://lists.debian.org/debian-lts-announce/2017/11/msg00032.htmlhttps://lists.x.org/archives/xorg-announce/2017-October/002808.htmlhttps://security.gentoo.org/glsa/201710-30http://www.debian.org/security/2017/dsa-4000http://www.openwall.com/lists/oss-security/2017/10/04/10http://www.securityfocus.com/bid/101253https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76achttps://lists.debian.org/debian-lts-announce/2017/11/msg00032.htmlhttps://lists.x.org/archives/xorg-announce/2017-October/002808.htmlhttps://security.gentoo.org/glsa/201710-30
2017-10-10
Published