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Bug 1473560 - (CVE-2017-11368) CVE-2017-11368 krb5: Invalid S4U2Self or S4U2Proxy request causes assertion failure
CVE-2017-11368 krb5: Invalid S4U2Self or S4U2Proxy request causes assertion f...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170713,repor...
: Security
Depends On: 1498768
Blocks: 1473562 1498774
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Reported: 2017-07-21 03:37 EDT by Andrej Nemec
Modified: 2018-10-19 17:42 EDT (History)
37 users (show)

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Doc Text:
A denial of service flaw was found in MIT Kerberos krb5kdc service. An authenticated attacker could use this flaw to cause krb5kdc to exit with an assertion failure by making an invalid S4U2Self or S4U2Proxy request.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0666 None None None 2018-04-10 04:02 EDT

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Description Andrej Nemec 2017-07-21 03:37:17 EDT 
It was found that in MIT krb5 1.7 and later, an authenticated attacker can cause an assertion failure in krb5kdc by sending an invalid S4U2Self or S4U2Proxy request.

Upstream patch:

https://github.com/krb5/krb5/pull/678/commits/ffb35baac698
Comment 4 errata-xmlrpc 2018-04-10 04:02:24 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0666 https://access.redhat.com/errata/RHSA-2018:0666
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