Debian Security Advisory
DSA-3466-1 krb5 -- security update
- Date Reported:
- 04 Feb 2016
- Affected Packages:
- 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:
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.
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.
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.