Ubuntu Security Notice USN-2549-1
25th March, 2015
libarchive vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
libarchive could be made to crash or overwrite files.
Software description
- libarchive
– Library to read/write archive files
Details
It was discovered that the libarchive bsdcpio utility extracted absolute
paths by default without using the –insecure flag, contrary to
expectations. If a user or automated system were tricked into extracting
cpio archives containing absolute paths, a remote attacker may be able to
write to arbitrary files. (CVE-2015-2304)
Fabian Yamaguchi discovered that libarchive incorrectly handled certain
type conversions. A remote attacker could possibly use this issue to cause
libarchive to crash, resulting in a denial of service. This issue only
affected Ubuntu 12.04 LTS. (CVE-2013-0211)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 14.10:
-
bsdcpio
3.1.2-9ubuntu0.1
-
libarchive13
3.1.2-9ubuntu0.1
- Ubuntu 14.04 LTS:
-
bsdcpio
3.1.2-7ubuntu2.1
-
libarchive13
3.1.2-7ubuntu2.1
- Ubuntu 12.04 LTS:
-
bsdcpio
3.0.3-6ubuntu1.1
-
libarchive12
3.0.3-6ubuntu1.1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.