USN-1589-1: GNU C Library vulnerabilities

Releases

• Ubuntu 12.04
• Ubuntu 11.10
• Ubuntu 11.04
• Ubuntu 10.04
• Ubuntu 8.04

Packages

• 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 versions:

Ubuntu 8.04

• libc6 - 2.7-10ubuntu8.2

Ubuntu 12.04

• libc6 - 2.15-0ubuntu10.2

Ubuntu 11.10

• libc6 - 2.13-20ubuntu5.2

Ubuntu 11.04

• libc6 - 2.13-0ubuntu13.2

Ubuntu 10.04

• libc6 - 2.11.1-0ubuntu7.11

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

• CVE-2012-3404
• CVE-2012-3405
• CVE-2012-3406
• CVE-2012-3480

Related notices

• USN-1589-2: glibc, libc6