Bug 1491236 (CVE-2017-14230)

Summary:	CVE-2017-14230 cyrus-imapd: Off-by-one error in prefix calculation in the mboxlist_do_find function
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	code, j, pokorra.mailinglists, pzhukov, vanmeeuwen+fedora, zdohnal
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	cyrus-imapd 3.0.4	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-09-15 08:13:36 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:	1491237
Bug Blocks:	1491238

Description Andrej Nemec 2017-09-13 11:36:11 UTC

In the mboxlist_do_find function in imap/mboxlist.c in Cyrus IMAP before 3.0.4, an off-by-one error in prefix calculation for the LIST command caused use of uninitialized memory, which might allow remote attackers to obtain sensitive information or cause a denial of service (daemon crash) via a 'LIST "" "Other Users"' command.

Upstream issue:

https://github.com/cyrusimap/cyrus-imapd/issues/2132

Upstream patch:

https://github.com/cyrusimap/cyrus-imapd/commit/6bd33275368edfa71ae117de895488584678ac79

Comment 1 Andrej Nemec 2017-09-13 11:37:13 UTC

Created cyrus-imapd tracking bugs for this issue:

Affects: fedora-25 [bug 1491237]

Comment 2 Jason Tibbitts 2017-09-13 15:13:22 UTC

My understanding was that this issue was not present previous to version 3.0.0, and thus Fedora 25 needs no fix.

Comment 3 Andrej Nemec 2017-09-14 07:13:52 UTC

(In reply to Jason Tibbitts from comment #2)
> My understanding was that this issue was not present previous to version
> 3.0.0, and thus Fedora 25 needs no fix.

This seems to hold true, thanks for closing the fedora bug. Let us finish the deeper analysis of cyrus-imapd in RHEL, then we'll close this one as well.

Comment 4 Pedro Yóssis Silva Barbosa 2017-09-26 15:55:20 UTC

This issue did not affect the versions of cyrus-imapd as shipped with Red Hat Enterprise Linux 5, 6, and 7.