Debian Security Advisory

DSA-3466-1 krb5 -- security update

Date Reported:
04 Feb 2016
Affected Packages:
krb5
Vulnerable:
Yes
Security database references:
In the Debian bugtracking system: Bug 813126, Bug 813127, Bug 813296.
In Mitre's CVE dictionary: CVE-2015-8629, CVE-2015-8630, CVE-2015-8631.
More information:

Several vulnerabilities were discovered in krb5, the MIT implementation of Kerberos. The Common Vulnerabilities and Exposures project identifies the following problems:

  • CVE-2015-8629

    It was discovered that an authenticated attacker can cause kadmind to read beyond the end of allocated memory by sending a string without a terminating zero byte. Information leakage may be possible for an attacker with permission to modify the database.

  • CVE-2015-8630

    It was discovered that an authenticated attacker with permission to modify a principal entry can cause kadmind to dereference a null pointer by supplying a null policy value but including KADM5_POLICY in the mask.

  • CVE-2015-8631

    It was discovered that an authenticated attacker can cause kadmind to leak memory by supplying a null principal name in a request which uses one. Repeating these requests will eventually cause kadmind to exhaust all available memory.

For the oldstable distribution (wheezy), these problems have been fixed in version 1.10.1+dfsg-5+deb7u7. The oldstable distribution (wheezy) is not affected by CVE-2015-8630.

For the stable distribution (jessie), these problems have been fixed in version 1.12.1+dfsg-19+deb8u2.

We recommend that you upgrade your krb5 packages.