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VuXML IDDescription
406636fe-055d-11e5-aab1-d050996490d0krb5 -- requires_preauth bypass in PKINIT-enabled KDC

MIT reports:

In MIT krb5 1.12 and later, when the KDC is configured with PKINIT support, an unauthenticated remote attacker can bypass the requires_preauth flag on a client principal and obtain a ciphertext encrypted in the principal's long-term key. This ciphertext could be used to conduct an off-line dictionary attack against the user's password.


Discovery 2015-05-25
Entry 2015-05-28
krb5
< 1.13.2

krb5-112
< 1.12.3_2

CVE-2015-2694
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160
e3f64457-cccd-11e2-af76-206a8a720317krb5 -- UDP ping-pong vulnerability in the kpasswd (password changing) service. [CVE-2002-2443]

No advisory has been released yet.

schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly validate UDP packets before sending responses, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged packet that triggers a communication loop, as demonstrated by krb_pingpong.nasl, a related issue to CVE-1999-0103. [CVE-2002-2443].


Discovery 2013-05-10
Entry 2013-06-03
krb5
le 1.11.2

CVE-2002-2443
http://web.mit.edu/kerberos/www/krb5-1.11/
24ce5597-acab-11e4-a847-206a8a720317krb5 -- Vulnerabilities in kadmind, libgssrpc, gss_process_context_token VU#540092

SO-AND-SO reports:

CVE-2014-5352: In the MIT krb5 libgssapi_krb5 library, after gss_process_context_token() is used to process a valid context deletion token, the caller is left with a security context handle containing a dangling pointer. Further uses of this handle will result in use-after-free and double-free memory access violations. libgssrpc server applications such as kadmind are vulnerable as they can be instructed to call gss_process_context_token().

CVE-2014-9421: If the MIT krb5 kadmind daemon receives invalid XDR data from an authenticated user, it may perform use-after-free and double-free memory access violations while cleaning up the partial deserialization results. Other libgssrpc server applications may also be vulnerable if they contain insufficiently defensive XDR functions.

CVE-2014-9422: The MIT krb5 kadmind daemon incorrectly accepts authentications to two-component server principals whose first component is a left substring of "kadmin" or whose realm is a left prefix of the default realm.

CVE-2014-9423: libgssrpc applications including kadmind output four or eight bytes of uninitialized memory to the network as part of an unused "handle" field in replies to clients.


Discovery 2015-02-03
Entry 2015-02-04
krb5
< 1.13_1

krb5-112
< 1.12.2_1

krb5-111
< 1.11.5_4

CVE-2014-5352
CVE-2014-9421
CVE-2014-9422
CVE-2014-9423
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2015-001.txt
3f3837cc-48fb-4414-aa46-5b1c23c9feaekrb5 -- Multiple vulnerabilities

MIT reports:

CVE-2017-11368:

In MIT krb5 1.7 and later, an authenticated attacker can cause an assertion failure in krb5kdc by sending an invalid S4U2Self or S4U2Proxy request.

CVE-2017-11462:

RFC 2744 permits a GSS-API implementation to delete an existing security context on a second or subsequent call to gss_init_sec_context() or gss_accept_sec_context() if the call results in an error. This API behavior has been found to be dangerous, leading to the possibility of memory errors in some callers. For safety, GSS-API implementations should instead preserve existing security contexts on error until the caller deletes them.

All versions of MIT krb5 prior to this change may delete acceptor contexts on error. Versions 1.13.4 through 1.13.7, 1.14.1 through 1.14.5, and 1.15 through 1.15.1 may also delete initiator contexts on error.


Discovery 2017-07-14
Entry 2017-10-18
krb5
< 1.14.6

ge 1.15 lt 1.15.2

krb5-devel
< 1.14.6

ge 1.15 lt 1.15.2

krb5-115
< 1.15.2

krb5-114
< 1.14.6

krb5-113
< 1.14.6

https://nvd.nist.gov/vuln/detail/CVE-2017-11368
https://krbdev.mit.edu/rt/Ticket/Display.html?id=8599
https://github.com/krb5/krb5/commit/ffb35baac6981f9e8914f8f3bffd37f284b85970
https://nvd.nist.gov/vuln/detail/CVE-2017-11462
https://krbdev.mit.edu/rt/Ticket/Display.html?id=8598
https://github.com/krb5/krb5/commit/56f7b1bc95a2a3eeb420e069e7655fb181ade5cf
CVE-2017-11368
CVE-2017-11462
3a888a1e-b321-11e4-83b2-206a8a720317krb5 -- Vulnerabilities in kadmind, libgssrpc, gss_process_context_token VU#540092

The MIT Kerberos team reports:

CVE-2014-5353: The krb5_ldap_get_password_policy_from_dn function in plugins/kdb/ldap/libkdb_ldap/ldap_pwd_policy.c in MIT Kerberos 5 (aka krb5) before 1.13.1, when the KDC uses LDAP, allows remote authenticated users to cause a denial of service (daemon crash) via a successful LDAP query with no results, as demonstrated by using an incorrect object type for a password policy.

CVE-2014-5354: plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.1, when the KDC uses LDAP, allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by creating a database entry for a keyless principal, as demonstrated by a kadmin "add_principal -nokey" or "purgekeys -all" command.


Discovery 2015-02-12
Entry 2015-02-12
Modified 2015-02-13
krb5
< 1.13.1

krb5-112
< 1.12.2_2

krb5-111
< 1.11.5_5

CVE-2014-5353
CVE-2014-5354
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2015-001.txt