USN-1589-1: GNU C Library vulnerabilities
Ubuntu Security Notice USN-1589-1
1st October, 2012
eglibc, glibc vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary
Multiple security issues were fixed in the GNU C Library.
Software description
- eglibc - GNU C Library
- glibc - GNU C Library
Details
It was discovered that positional arguments to the printf() family
of functions were not handled properly in the GNU C Library. An
attacker could possibly use this to cause a stack-based buffer
overflow, creating a denial of service or possibly execute arbitrary
code. (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)
It was discovered that multiple integer overflows existed in the
strtod(), strtof() and strtold() functions in the GNU C Library. An
attacker could possibly use this to trigger a stack-based buffer
overflow, creating a denial of service or possibly execute arbitrary
code. (CVE-2012-3480)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.04 LTS:
- libc6 2.15-0ubuntu10.2
- Ubuntu 11.10:
- libc6 2.13-20ubuntu5.2
- Ubuntu 11.04:
- libc6 2.13-0ubuntu13.2
- Ubuntu 10.04 LTS:
- libc6 2.11.1-0ubuntu7.11
- Ubuntu 8.04 LTS:
- libc6 2.7-10ubuntu8.2
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.