Bug 1753589 (CVE-2019-14844)

Summary: CVE-2019-14844 krb5: reversed strlcpy() allows client to crash the KDC
Product: [Other] Security Response Reporter: msiddiqu
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: abokovoy, csutherl, dblechte, dfediuck, dpal, eedri, gzaronik, jclere, jplans, j, lgao, mbabacek, mgoldboi, michal.skrivanek, mturk, myarboro, nalin, npmccallum, pkis, rharwood, sbonazzo, sbose, security-response-team, sherold, ssorce, twalsh, weli, yturgema
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way a Kerberos client could crash the KDC by sending one of the RFC 4556 "enctypes". A remote unauthenticated user could use this flaw to crash the KDC.
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-11-20 06:51:12 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1754369    
Bug Blocks: 1753106    

Description msiddiqu 2019-09-19 11:19:57 UTC
A client can crash the KDC in enctype_name() by sendingone of the RFC 4556 enctypes, because of reversed strlcpy() arguments atthe end of enctype_name()



Comment 1 Huzaifa S. Sidhpurwala 2019-09-23 05:27:02 UTC
This issue is caused by backporting commits due to the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=1664157

Comment 5 Huzaifa S. Sidhpurwala 2019-09-26 03:55:09 UTC
External References:


Comment 7 Huzaifa S. Sidhpurwala 2019-09-26 03:59:13 UTC

This flaw affects the krb5 server only; client-side packages are not affected. This flaw does not affect any krb5 packages shipped with Red Hat products.

Comment 8 Product Security DevOps Team 2019-11-20 06:51:12 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):