- Update to version 7.8.0
+ This release includes both the Heimdal 7.7.1 Security
Vulnerability fixes and non-Security bug fixes/improvements.
+ Security Vulnerabilities:
- CVE-2022-42898 PAC parse integer overflows
- CVE-2022-3437 Overflows and non-constant time leaks in
DES{,3} and arcfour
- CVE-2022-41916 Fix Unicode normalization read of 1 bytes past
end of array
- CVE-2021-44758 A null pointer de-reference DoS in SPNEGO
acceptors
- CVE-2021-3671 A null pointer de-reference when handling
missing sname in TGS-REQ
- 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
+ Other changes:
- Bugs found by UBSAN (including the incorrect encoding of
unconstrained INTEGER value -1).
- Errors found by the LLVM scan-build static analyzer.
- Errors found by the valgrind memory debugger.
- Work around GCC Bug 95189 (memcmp wrongly stripped like
strcmp).
- Correct ASN.1 OID typo for SHA-384
- Fix a deadlock in in the MEMORY ccache type.
- TGS: strip forwardable and proxiable flags if the server is
disallowed.
- 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
- Incremental HDB propagation improvements
Refactor send_diffs making it progressive
Handle partial writes on non-blocking sockets
Disable Nagle in iprop master and slave
Use async I/O
Don't send I_HAVE in response to AYT
Do not recover log in kadm5_get_principal()
Don't send diffs to slaves with not yet known version
Don't stutter in send_diffs
- Optional backwards-compatible anon-pkinit behavior
- Removed heimdal-7.7.0-autoconf-2.70.patch, fixed upstream.
OBS-URL: https://build.opensuse.org/request/show/1044076
OBS-URL: https://build.opensuse.org/package/show/network/libheimdal?expand=0&rev=29
- Update 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.
- Solaris:
+ Define _STDC_C11_BCI for memset_s prototype
- build tooling:
+ Convert from python 2 to python 3
- 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
- Solaris:
+ PKCS#11 hcrypto backend broken since 7.0.1
+ Building with Sun Pro C
+ 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
- fixed heimdal-patched.diff and reproducible.patch
OBS-URL: https://build.opensuse.org/request/show/711480
OBS-URL: https://build.opensuse.org/package/show/network/libheimdal?expand=0&rev=23
- Update to version 7.5.0
- Security
- Fix CVE-2017-17439, which is a remote denial of service
vulnerability:
In Heimdal 7.1 through 7.4, remote unauthenticated attackers
are able to crash the KDC by sending a crafted UDP packet
containing empty data fields for client name or realm.
- Bug fixes
- Handle long input lines when reloading database dumps.
- In pre-forked mode (default on Unix), correctly clear the
process ids of exited children, allowing new child processes
to replace the old.
- Fixed incorrect KDC response when no-cross realm TGT exists,
allowing client requests to fail quickly rather than time
out after trying to get a correct answer from each KDC.
- Fixed heimdal-patched.diff.
- Removed Avoid_NULL_structure_pointer_member_dereference.patch,
fixed upstream.
OBS-URL: https://build.opensuse.org/request/show/560558
OBS-URL: https://build.opensuse.org/package/show/network/libheimdal?expand=0&rev=19
- Added a patched instead of the original tarball because only
shared libraries will be build and source files of these (not to
be build) programs have problematic licenses.
- Added script heimdal-patch-source.sh to sources.
- Added patch heimdal-patched.diff that fixes configure.ac and
several Makefile.am files to successfully build patched source.
- Removed unneeded dependencies in spec file for build.
OBS-URL: https://build.opensuse.org/request/show/329265
OBS-URL: https://build.opensuse.org/package/show/network/libheimdal?expand=0&rev=7
