Security Information / 2015 / Security Information -- DSA-3395-1 krb5

Debian Security Advisory

DSA-3395-1 krb5 -- security update

Date Reported:

06 Nov 2015

Affected Packages:

krb5

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 803083, Bug 803084, Bug 803088.
In Mitre's CVE dictionary: CVE-2015-2695, CVE-2015-2696, CVE-2015-2697.

More information:

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

• CVE-2015-2695

  It was discovered that applications which call gss_inquire_context() on a partially-established SPNEGO context can cause the GSS-API library to read from a pointer using the wrong type, leading to a process crash.

• CVE-2015-2696

  It was discovered that applications which call gss_inquire_context() on a partially-established IAKERB context can cause the GSS-API library to read from a pointer using the wrong type, leading to a process crash.

• CVE-2015-2697

  It was discovered that the build_principal_va() function incorrectly handles input strings. An authenticated attacker can take advantage of this flaw to cause a KDC to crash using a TGS request with a large realm field beginning with a null byte.

For the oldstable distribution (wheezy), these problems have been fixed in version 1.10.1+dfsg-5+deb7u4.

For the stable distribution (jessie), these problems have been fixed in version 1.12.1+dfsg-19+deb8u1.

For the testing distribution (stretch), these problems have been fixed in version 1.13.2+dfsg-3.

For the unstable distribution (sid), these problems have been fixed in version 1.13.2+dfsg-3.

We recommend that you upgrade your krb5 packages.