heimdal: Fix: Too large time skew, client time 1970-01-01T01:00:00

Part of ed549cb0c53f zeroed out a data structure in the resulting code-file
when a TUTCTime type was freed. This part of the patch

heimdal: Fix: Too large time skew, client time 1970-01-01T01:00:00

Part of ed549cb0c53f zeroed out a data structure in the resulting code-file
when a TUTCTime type was freed. This part of the patch applies to Heimdal
7.1+ and not our Heimdal 1.5.2.

PR: 267827
Reported by: Peter Much <[email protected]>
Tested by: Peter Much <[email protected]>
Approved by: so
Security: FreeBSD-EN-22:28.heimdal
Fixes: ed549cb0c53f

(cherry picked from commit f556a05c49261af3d373c599d05fa250f3563b59)
(cherry picked from commit b23fe6badebad9a9b2022e95b50451a41c7b4f7a)

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heimdal: Fix multiple security vulnerabilities

The following issues are patched:

- CVE-2022-42898 PAC parse integer overflows
- CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and

heimdal: Fix multiple security vulnerabilities

The following issues are patched:

- CVE-2022-42898 PAC parse integer overflows
- CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour
- CVE-2021-44758 NULL dereference DoS in SPNEGO acceptors
- CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec

Note that CVE-2022-44640 is a severe vulnerability, possibly a 10.0
on the Common Vulnerability Scoring System (CVSS) v3, as we believe
it should be possible to get an RCE on a KDC, which means that
credentials can be compromised that can be used to impersonate
anyone in a realm or forest of realms.

Heimdal's ASN.1 compiler generates code that allows specially
crafted DER encodings of CHOICEs to invoke the wrong free function
on the decoded structure upon decode error. This is known to impact
the Heimdal KDC, leading to an invalid free() of an address partly
or wholly under the control of the attacker, in turn leading to a
potential remote code execution (RCE) vulnerability.

This error affects the DER codec for all extensible CHOICE types
used in Heimdal, though not all cases will be exploitable. We have
not completed a thorough analysis of all the Heimdal components
affected, thus the Kerberos client, the X.509 library, and other
parts, may be affected as well.

This bug has been in Heimdal's ASN.1 compiler since 2005, but it may
only affect Heimdal 1.6 and up. It was first reported by Douglas
Bagnall, though it had been found independently by the Heimdal
maintainers via fuzzing a few weeks earlier.

While no zero-day exploit is known, such an exploit will likely be
available soon after public disclosure.

- CVE-2019-14870: Validate client attributes in protocol-transition
- CVE-2019-14870: Apply forwardable policy in protocol-transition
- CVE-2019-14870: Always lookup impersonate client in DB

Sponsored by: so (philip)
Obtained from: so (philip)
Tested by: philip, cy

(cherry picked from commit ed549cb0c53f8438c52593ce811f6fcc812248e9)
(cherry picked from commit d0b6550173d25689ee820c1e0a0aea36f6806098)

Approved by: so
Security: FreeBSD-SA-22:14.heimdal

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