Bug 1550602 – CVE-2018-5734 bind: A malformed request can trigger an assertion failure in badcache.c

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Bug 1550602 - (CVE-2018-5734) CVE-2018-5734 bind: A malformed request can trigger an assertion failure in badcache.c

Summary:	CVE-2018-5734 bind: A malformed request can trigger an assertion failure in b...

Status:	CLOSED NOTABUG

Aliases:	CVE-2018-5734

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	high Severity high
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Assigned To:	Red Hat Product Security
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Whiteboard:	impact=important,public=20180228,repo...
Keywords:	Security

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Reported:	2018-03-01 10:14 EST by Adam Mariš
Modified:	2018-03-01 10:16 EST (History)
CC List:	8 users (show)

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Last Closed:	2018-03-01 10:16:28 EST
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Description Adam Mariš 2018-03-01 10:14:03 EST

While handling a particular type of malformed packet BIND erroneously selects a SERVFAIL rcode instead of a FORMERR rcode.  If the receiving view has the SERVFAIL cache feature enabled, this can trigger an assertion failure in badcache.c when the request doesn't contain all of the expected information.

External References:

https://kb.isc.org/article/AA-01562/

Comment 1 Adam Mariš 2018-03-01 10:14:12 EST

Acknowledgments:

Name: ISC

Comment 2 Adam Mariš 2018-03-01 10:16:36 EST

Statement:

This issue did not affect the versions of bind as shipped with Red Hat Enterprise Linux 5, 6 and 7 as they did not include the vulnerable code.

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