9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.459 Medium
EPSS
Percentile
97.3%
The X Window System is a graphical windowing system based on a client/server model.
regenrecht reported multiple vulnerabilities in various X server extension via iDefense:
Remote attackers could exploit the vulnerability in the Xfont library by enticing a user to load a specially crafted PCF font file resulting in the execution of arbitrary code with the privileges of the user running the X server, typically root. Local attackers could exploit this and the vulnerabilities in the X.org extensions to gain elevated privileges. If the X server allows connections from the network, these vulnerabilities could be exploited remotely. A local attacker could determine the existence of arbitrary files by exploiting the last vulnerability or possibly cause a Denial of Service.
Workarounds for some of the vulnerabilities can be found in the X.Org security advisory as listed under References.
All X.Org X server users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.3.0.0-r5"
All X.Org Xfont library users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.3.1-r1"
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Gentoo | any | all | x11-base/xorg-server | < 1.3.0.0-r5 | UNKNOWN |
Gentoo | any | all | x11-libs/libxfont | < 1.3.1-r1 | UNKNOWN |