Debian Security Advisory

DLA-582-1 libidn -- LTS security update

Date Reported:
02 Aug 2016
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2015-8948, CVE-2016-6261, CVE-2016-6263.
More information:

Multiple vulnerabilities have been discovered in libidn. The Common Vulnerabilities and Exposures project identifies the following problems:

  • CVE-2015-8948

    When idn is reading one zero byte as input an out-of-bounds-read occurred.

  • CVE-2016-6261

    An out-of-bounds stack read is exploitable in idna_to_ascii_4i.

  • CVE-2016-6263

    stringprep_utf8_nfkc_normalize reject invalid UTF-8, causes a crash.

For Debian 7 Wheezy, these problems have been fixed in version 1.25-2+deb7u2.

We recommend that you upgrade your libidn packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: