USN-2549-1: libarchive vulnerabilities

Releases

• Ubuntu 14.10
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• 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 versions:

Ubuntu 14.10

• bsdcpio - 3.1.2-9ubuntu0.1
• libarchive13 - 3.1.2-9ubuntu0.1

Ubuntu 14.04

• bsdcpio - 3.1.2-7ubuntu2.1
• libarchive13 - 3.1.2-7ubuntu2.1

Ubuntu 12.04

• bsdcpio - 3.0.3-6ubuntu1.1
• libarchive12 - 3.0.3-6ubuntu1.1

In general, a standard system update will make all the necessary changes.

References

• CVE-2013-0211
• CVE-2015-2304