Bug 1578591 (CVE-2018-5736) - CVE-2018-5736 bind: Multiple transfers of a zone in quick succession can cause an assertion failure in rbtdb.c
Summary: CVE-2018-5736 bind: Multiple transfers of a zone in quick succession can caus...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2018-5736
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1578903
Blocks: 1578592
TreeView+ depends on / blocked
 
Reported: 2018-05-15 23:52 UTC by Sam Fowler
Modified: 2021-09-09 14:04 UTC (History)
16 users (show)

Fixed In Version: bind 9.12.1-P2
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way zone databases were handled by bind. An attacker with permissions to initiate a zone transfer could cause bind to crash.
Clone Of:
Environment:
Last Closed: 2018-05-17 04:01:31 UTC
Embargoed:

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Description Sam Fowler 2018-05-15 23:52:04 UTC 
BIND versions 9.12.0 and 9.12.1 have an error in zone database reference counting that can lead to an assertion failure if a server attempts several transfers of a slave zone in quick succession.

This defect could be deliberately exercised by an attacker who is permitted to cause a vulnerable server to initiate zone transfers (for example: by sending valid NOTIFY messages), causing the named process to exit after failing the assertion test.
Comment 2 Huzaifa S. Sidhpurwala 2018-05-17 03:59:20 UTC 
Statement:

This security flaw only affects bind versions 9.12.0 and 9.12.1. Since Red Hat Enterprise Linux does not ship any of these bind versions, it is not affected.
Comment 3 Sam Fowler 2018-05-20 23:47:29 UTC 
External Reference:

https://kb.isc.org/article/AA-01602/74/CVE-2018-5736


Upstream Patch:

https://ftp.isc.org/isc/bind9/9.12.1-P2/patches/cve5736.patch
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