Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : krb5 vulnerabilities (USN-1030-1)

Ubuntu Security Notice (C) 2010-2013 Canonical, Inc. / NASL script (C) 2010-2013 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

It was discovered that Kerberos did not properly determine the
acceptability of certain checksums. A remote attacker could use
certain checksums to alter the prompt message, modify a response to a
Key Distribution Center (KDC) or forge a KRB-SAFE message.
(CVE-2010-1323)

It was discovered that Kerberos did not properly determine the
acceptability of certain checksums. A remote attacker could use
certain checksums to forge GSS tokens or gain privileges. This issue
only affected Ubuntu 9.10, 10.04 LTS and 10.10. (CVE-2010-1324)

It was discovered that Kerberos did not reject RC4 key-derivation
checksums. An authenticated remote user could use this issue to forge
AD-SIGNEDPATH or AD-KDC-ISSUED signatures and possibly gain
privileges. This issue only affected Ubuntu 10.04 LTS and 10.10.
(CVE-2010-4020)

It was discovered that Kerberos did not properly restrict the use of
TGT credentials for armoring TGS requests. A remote authenticated user
could use this flaw to impersonate a client. This issue only affected
Ubuntu 9.10. (CVE-2010-4021).

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 3.4
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 51116 ()

Bugtraq ID: 45116
45117
45118
45122

CVE ID: CVE-2010-1323
CVE-2010-1324
CVE-2010-4020
CVE-2010-4021