7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.905 High
EPSS
Percentile
98.8%
The X.Org X11 X Font Server provides a standard mechanism for an X server to communicate with a font renderer.
iDefense reported that the xfs init script does not correctly handle a race condition when setting permissions of a temporary file (CVE-2007-3103). Sean Larsson discovered an integer overflow vulnerability in the build_range() function possibly leading to a heap-based buffer overflow when handling “QueryXBitmaps” and “QueryXExtents” protocol requests (CVE-2007-4568). Sean Larsson also discovered an error in the swap_char2b() function possibly leading to a heap corruption when handling the same protocol requests (CVE-2007-4990).
The first issue would allow a local attacker to change permissions of arbitrary files to be world-writable by performing a symlink attack. The second and third issues would allow a local attacker to execute arbitrary code with privileges of the user running the X Font Server, usually xfs.
There is no known workaround at this time.
All X Font Server users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-apps/xfs-1.0.5"
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Gentoo | any | all | x11-apps/xfs | < 1.0.5 | UNKNOWN |