This update for libheimdal fixes the following issues :

libheimdal was updated to version 7.7.0 :

  + Bug fixes :

  - PKCS#11 hcrypto back-end :

  + initialize the p11_module_load function list

  + verify that not only is a mechanism present but that its     mechanism info states that it offers the required     encryption, decryption or digest services

  - krb5 :

  + Starting with 7.6, Heimdal permitted requesting     authenticated anonymous tickets. However, it did not     verify that a KDC in fact returned an anonymous ticket     when one was requested.

  + Cease setting the KDCOption reaquest_anonymous flag when     issuing S4UProxy (constrained delegation) TGS requests.

  + when the Win2K PKINIT compatibility option is set, do     not require krbtgt otherName to match when validating     KDC certificate.

  + set PKINIT_BTMM flag per Apple implementation

  + use memset_s() instead of memset()

  - kdc :

  + When generating KRB5SignedPath in the AS, use the reply     client name rather than the one from the request, so     validation will work correctly in the TGS.

  + allow checksum of PA-FOR-USER to be HMAC_MD5. Even if     TGT used an enctype with a different checksum. Per     [MS-SFU] 2.2.1 PA-FOR-USER the checksum is always     HMAC_MD5, and that's what Windows and MIT clients send.
    In Heimdal both the client and kdc use instead the     checksum of the TGT, and therefore work with each other     but Windows and MIT clients fail against Heimdal KDC.
    Both Windows and MIT KDC would allow any keyed checksum     to be used so Heimdal client work fine against it.
    Change Heimdal KDC to allow HMAC_MD5 even for non RC4     based TGT in order to support per-spec clients.

  + use memset_s() instead of memset()

  + Detect Heimdal 1.0 through 7.6 clients that issue     S4UProxy (constrained delegation) TGS Requests with the     request anonymous flag set. These requests will be     treated as S4UProxy requests and not anonymous requests.

  - HDB :

  + Set SQLite3 backend default page size to 8KB.

  + Add hdb_set_sync() method

  - kadmind :

  + disable HDB sync during database load avoiding     unnecessary disk i/o.

  - ipropd :

  + disable HDB sync during receive_everything. Doing an     fsync per-record when receiving the complete HDB is a     performance disaster. Among other things, if the HDB is     very large, then one slave receving a full HDB can cause     other slaves to timeout and, if HDB write activity is     high enough to cause iprop log truncation, then also     need full syncs, which leads to a cycle of full syncs     for all slaves until HDB write activity drops. Allowing     the iprop log to be larger helps, but improving     receive_everything() performance helps even more.

  - kinit :

  + Anonymous PKINIT tickets discard the realm information     used to locate the issuing AS. Store the issuing realm     in the credentials cache in order to locate a KDC which     can renew them.

  + Do not leak the result of krb5_cc_get_config() when     determining anonymous PKINIT start realm.

  - klist :

  + Show transited-policy-checked, ok-as-delegate and     anonymous flags when listing credentials.

  - tests :

  + Regenerate certs so that they expire before the 2038     armageddon so the test suite will pass on 32-bit     operating systems until the underlying issues can be     resolved.

  - documentation :

  + rename verify-password to verify-password-quality

  + hprop default mode is encrypt

  + kadmind 'all' permission does not include 'get-keys'

  + verify-password-quality might not be stateless

Version 7.6.0 :

  + Security (#555) :

  - CVE-2018-16860 Heimdal KDC: Reject PA-S4U2Self with     unkeyed checksum

    When the Heimdal KDC checks the checksum that is placed     on the S4U2Self packet by the server to protect the     requested principal against modification, it does not     confirm that the checksum algorithm that protects the     user name (principal) in the request is keyed. This     allows a man-in-the-middle attacker who can intercept     the request to the KDC to modify the packet by replacing     the user name (principal) in the request with any     desired user name (principal) that exists in the KDC and     replace the checksum protecting that name with a CRC32     checksum (which requires no prior knowledge to compute).
    This would allow a S4U2Self ticket requested on behalf     of user name (principal) user@EXAMPLE.COM to any service     to be changed to a S4U2Self ticket with a user name     (principal) of Administrator@EXAMPLE.COM. This ticket     would then contain the PAC of the modified user name     (principal).

  - CVE-2019-12098, client-only :

    RFC8062 Section 7 requires verification of the     PA-PKINIT-KX key exchange when anonymous PKINIT is used.
    Failure to do so can permit an active attacker to become     a man-in-the-middle.

  + Bug fixes :

  - Happy eyeballs: Don't wait for responses from     known-unreachable KDCs.

  - kdc :

  + check return copy_Realm, copy_PrincipalName,     copy_EncryptionKey

  - kinit :

  + cleanup temporary ccaches

  + see man page for 'kinit --anonymous' command line syntax     change

  - kdc :

  + Make anonymous AS-requests more RFC8062-compliant.
    Updated expired test certificates

  + Features :

  - kuser: support authenticated anonymous AS-REQs in kinit

  - kdc: support for anonymous TGS-REQs

  - kgetcred support for anonymous service tickets

  - Support builds with OpenSSL 1.1.1

Detections

Analytics

openSUSE Security Update : libheimdal (openSUSE-2019-1682)

high Nessus Plugin ID 126437

Version 1.7

Version 1.6

Version 1.7 Feb 18, 2025, 11:54 PM Plugin metadata (CVSS 3 Change AC:H --> AC:L where needed) Plugin Feed: 202502182354
Version 1.6 May 13, 2024, 8:02 AM CVSSv2 score source (set to "CVE-2018-16860") Exploit attributes ("Exploit available" set to "False") Plugin Feed: 202405130802