Bug 1578591 – CVE-2018-5736 bind: Multiple transfers of a zone in quick succession can cause an assertion failure in rbtdb.c

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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...

Status:	CLOSED NOTABUG

Aliases:	CVE-2018-5736

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

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20180518,repor...
Keywords:	Security

Depends On:	1578903
Blocks:	1578592
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Reported:	2018-05-15 19:52 EDT by Sam Fowler
Modified:	2018-05-23 20:06 EDT (History)
CC List:	16 users (show)

See Also:
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.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2018-05-17 00:01:31 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Sam Fowler 2018-05-15 19:52:04 EDT

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 2018-05-16 23:59:20 EDT

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 19:47:29 EDT

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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