Bug 1849775 (CVE-2017-9103)

Summary:	CVE-2017-9103 adns: pap_mailbox822 does not properly check st from adns__findlabel_next
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	rvokal, sergio, thozza, vonsch
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-06-22 23:20:33 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1849776
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2020-06-22 19:21:39 UTC

An issue was discovered in adns before 1.5.2. pap_mailbox822 does not properly check st from adns__findlabel_next. Without this, an uninitialised stack value can be used as the first label length. Depending on the circumstances, an attacker might be able to trick adns into crashing the calling program, leaking aspects of the contents of some of its memory, causing it to allocate lots of memory, or perhaps overrunning a buffer. This is only possible with applications which make non-raw queries for SOA or RP records.

Reference:
https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.html

Comment 1 Guilherme de Almeida Suckevicz 2020-06-22 19:21:53 UTC

Created adns tracking bugs for this issue:

Affects: fedora-all [bug 1849776]

Comment 2 Product Security DevOps Team 2020-06-22 23:20:33 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.