CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
EPSS
Percentile
92.9%
LibXfont is the X.Org font library. TightVNC is a VNC client/server for X displays.
The libXfont code is prone to several integer overflows, in functions ProcXCMiscGetXIDList(), bdfReadCharacters() and FontFileInitTable(). TightVNC contains a local copy of this code and is also affected.
A local attacker could use a specially crafted BDF Font to gain root privileges on the vulnerable host.
There is no known workaround at this time.
All libXfont users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.7-r1"
All TightVNC users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/tightvnc-1.2.9-r4"
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Gentoo | any | all | net-misc/tightvnc | < 1.2.9-r4 | UNKNOWN |
Gentoo | any | all | x11-libs/libxfont | < 1.2.7-r1 | UNKNOWN |