Bug 2230178 (CVE-2023-36054) - CVE-2023-36054 krb5: Denial of service through freeing uninitialized pointer
Summary: CVE-2023-36054 krb5: Denial of service through freeing uninitialized pointer
Keywords:
Status: NEW
Alias: CVE-2023-36054
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2229113 2230179 2230181 2230182
Blocks: 2230180
TreeView+ depends on / blocked
 
Reported: 2023-08-08 20:17 UTC by Pedro Sampaio
Modified: 2024-03-18 13:08 UTC (History)
52 users (show)

Fixed In Version: krb5 1.20.2, krb5 1.21.1
Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the _xdr_kadm5_principal_ent_rec() function in lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (krb5). This issue occurs due to lack of validation in the relationship between n_key_data and the key_data array count, leading to the freeing of uninitialized pointers. This may allow a remote authenticated attacker to send a specially crafted request that causes the kadmind process to crash, resulting in a denial of service (DoS).
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:6699 0 None None None 2023-11-07 08:22:40 UTC

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]
Comment 7 errata-xmlrpc 2023-11-07 08:22:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6699 https://access.redhat.com/errata/RHSA-2023:6699
Note You need to log in before you can comment on or make changes to this bug.