Bug 2230178 (TRIAGE-CVE-2023-36054) - TRIAGE-CVE-2023-36054 krb5: Denial of service through freeing uninitialized pointer
Summary: TRIAGE-CVE-2023-36054 krb5: Denial of service through freeing uninitialized p...
Keywords:
Status: NEW
Alias: TRIAGE-CVE-2023-36054
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
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Depends On: 2230182 2229113 2230179 2230181
Blocks: 2230180
TreeView+ depends on / blocked
 
Reported: 2023-08-08 20:17 UTC by Pedro Sampaio
Modified: 2023-08-09 16:14 UTC (History)
53 users (show)

Fixed In Version: krb5 1.20.2, krb5 1.21.1
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Description Pedro Sampaio 2023-08-08 20:17:11 UTC 
lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because _xdr_kadm5_principal_ent_rec does not validate the relationship between n_key_data and the key_data array count.

References:

https://web.mit.edu/kerberos/www/advisories/
https://github.com/krb5/krb5/compare/krb5-1.20.1-final...krb5-1.20.2-final
https://github.com/krb5/krb5/commit/ef08b09c9459551aabbe7924fb176f1583053cdd
https://github.com/krb5/krb5/compare/krb5-1.21-final...krb5-1.21.1-final
Comment 1 Pedro Sampaio 2023-08-08 20:17:41 UTC 
Created krb5 tracking bugs for this issue:

Affects: fedora-all [bug 2230179]
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