CVE-2012-6656 Denial of service in n/a

What is CVE-2012-6656?

CVE-2012-6656 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 5 Dec 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of "0xffff" to the iconv function when converting IBM930 encoded data to UTF-8.

Weakness: CWE-20

Which versions are affected by CVE-2012-6656?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Gnu Glibc.

How do I fix CVE-2012-6656?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2012-6656 being exploited?

There is no known exploitation of CVE-2012-6656 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2012-6656, GHSA-g6fx-pmc7-2qhp.