Vulnerability Assessment & Network Security Forums
If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
ClamAV: Denial of Service
Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200703-03
(ClamAV: Denial of Service)
An anonymous researcher discovered a file descriptor leak error in the
processing of CAB archives and a lack of validation of the "id"
parameter string used to create local files when parsing MIME headers.
A remote attacker can send several crafted CAB archives with a
zero-length record header that will fill the available file descriptors
until no other is available, which will prevent ClamAV from scanning
most archives. A possible hacker can also send an email with specially
crafted MIME headers to overwrite local files with the permissions of
the user running ClamAV, such as the virus database file, which could
prevent ClamAV from detecting any virus.
The first vulnerability can be prevented by refusing any file of type
CAB, but there is no known workaround for the second issue.
All ClamAV users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.90"
Network Security Threat Level: Medium
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2007 Michel Arboi
|IBM DX360 M3 SERVER TWO E5506 2.13GHZ 64GB 1TB SAS 2 X TESLA M1060 CONNECTX-2
|IBM SYSTEM X3550 M3 SERVER E5640 2.66GHZ 4GB 3 X 146GB 15K SAS
|IBM HX5 BLADECENTER SERVER E7530 1.86GHZ 48GB NO HDD
|IBM SYSTEM X3650 M4 2.5 SERVER E5-2620V2 2.10GHZ 4GB 7 X 146GB 15K SAS M5110E
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