USN-2310-1: Kerberos vulnerabilities
Ubuntu Security Notice USN-2310-1
11th August, 2014
krb5 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS
Summary
Several security issues were fixed in Kerberos.
Software description
- krb5 - MIT Kerberos Network Authentication Protocol
Details
It was discovered that Kerberos incorrectly handled certain crafted Draft 9
requests. A remote attacker could use this issue to cause the daemon to
crash, resulting in a denial of service. This issue only affected Ubuntu
12.04 LTS. (CVE-2012-1016)
It was discovered that Kerberos incorrectly handled certain malformed
KRB5_PADATA_PK_AS_REQ AS-REQ requests. A remote attacker could use this
issue to cause the daemon to crash, resulting in a denial of service. This
issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. (CVE-2013-1415)
It was discovered that Kerberos incorrectly handled certain crafted TGS-REQ
requests. A remote authenticated attacker could use this issue to cause the
daemon to crash, resulting in a denial of service. This issue only affected
Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. (CVE-2013-1416)
It was discovered that Kerberos incorrectly handled certain crafted
requests when multiple realms were configured. A remote attacker could use
this issue to cause the daemon to crash, resulting in a denial of service.
This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS.
(CVE-2013-1418, CVE-2013-6800)
It was discovered that Kerberos incorrectly handled certain invalid tokens.
If a remote attacker were able to perform a man-in-the-middle attack, this
flaw could be used to cause the daemon to crash, resulting in a denial of
service. (CVE-2014-4341, CVE-2014-4342)
It was discovered that Kerberos incorrectly handled certain mechanisms when
used with SPNEGO. If a remote attacker were able to perform a
man-in-the-middle attack, this flaw could be used to cause clients to
crash, resulting in a denial of service. (CVE-2014-4343)
It was discovered that Kerberos incorrectly handled certain continuation
tokens during SPNEGO negotiations. A remote attacker could use this issue
to cause the daemon to crash, resulting in a denial of service.
(CVE-2014-4344)
Tomas Kuthan and Greg Hudson discovered that the Kerberos kadmind daemon
incorrectly handled buffers when used with the LDAP backend. A remote
attacker could use this issue to cause the daemon to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2014-4345)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 14.04 LTS:
- libkadm5srv-mit9 1.12+dfsg-2ubuntu4.2
- libk5crypto3 1.12+dfsg-2ubuntu4.2
- krb5-kdc-ldap 1.12+dfsg-2ubuntu4.2
- libkrad0 1.12+dfsg-2ubuntu4.2
- krb5-otp 1.12+dfsg-2ubuntu4.2
- libkdb5-7 1.12+dfsg-2ubuntu4.2
- krb5-pkinit 1.12+dfsg-2ubuntu4.2
- libkadm5clnt-mit9 1.12+dfsg-2ubuntu4.2
- libkrb5-3 1.12+dfsg-2ubuntu4.2
- krb5-user 1.12+dfsg-2ubuntu4.2
- krb5-kdc 1.12+dfsg-2ubuntu4.2
- libgssrpc4 1.12+dfsg-2ubuntu4.2
- libkrb5support0 1.12+dfsg-2ubuntu4.2
- libgssapi-krb5-2 1.12+dfsg-2ubuntu4.2
- krb5-admin-server 1.12+dfsg-2ubuntu4.2
- Ubuntu 12.04 LTS:
- libkadm5srv-mit8 1.10+dfsg~beta1-2ubuntu0.5
- libk5crypto3 1.10+dfsg~beta1-2ubuntu0.5
- krb5-kdc-ldap 1.10+dfsg~beta1-2ubuntu0.5
- libkdb5-6 1.10+dfsg~beta1-2ubuntu0.5
- krb5-pkinit 1.10+dfsg~beta1-2ubuntu0.5
- libkadm5clnt-mit8 1.10+dfsg~beta1-2ubuntu0.5
- libkrb5-3 1.10+dfsg~beta1-2ubuntu0.5
- krb5-user 1.10+dfsg~beta1-2ubuntu0.5
- krb5-kdc 1.10+dfsg~beta1-2ubuntu0.5
- libgssrpc4 1.10+dfsg~beta1-2ubuntu0.5
- libkrb5support0 1.10+dfsg~beta1-2ubuntu0.5
- libgssapi-krb5-2 1.10+dfsg~beta1-2ubuntu0.5
- krb5-admin-server 1.10+dfsg~beta1-2ubuntu0.5
- Ubuntu 10.04 LTS:
- libk5crypto3 1.8.1+dfsg-2ubuntu0.13
- krb5-kdc-ldap 1.8.1+dfsg-2ubuntu0.13
- libkdb5-4 1.8.1+dfsg-2ubuntu0.13
- libkadm5srv-mit7 1.8.1+dfsg-2ubuntu0.13
- krb5-pkinit 1.8.1+dfsg-2ubuntu0.13
- krb5-admin-server 1.8.1+dfsg-2ubuntu0.13
- libkrb5-3 1.8.1+dfsg-2ubuntu0.13
- krb5-user 1.8.1+dfsg-2ubuntu0.13
- krb5-kdc 1.8.1+dfsg-2ubuntu0.13
- libgssrpc4 1.8.1+dfsg-2ubuntu0.13
- libkrb5support0 1.8.1+dfsg-2ubuntu0.13
- libgssapi-krb5-2 1.8.1+dfsg-2ubuntu0.13
- libkadm5clnt-mit7 1.8.1+dfsg-2ubuntu0.13
To update your system, please follow these instructions: http://bit.ly/1aJDvTw.
In general, a standard system update will make all the necessary changes.
References
CVE-2012-1016, CVE-2013-1415, CVE-2013-1416, CVE-2013-1418, CVE-2013-6800, CVE-2014-4341, CVE-2014-4342, CVE-2014-4343, CVE-2014-4344, CVE-2014-4345
from Ubuntu Security Notices http://bit.ly/1ymNZmt