Bug 641276 – CVE-2010-3780 Dovecot: Busy master process, receiving a lot of SIGCHLD signals rapidly while logging, could die

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Bug 641276 - (CVE-2010-3780) CVE-2010-3780 Dovecot: Busy master process, receiving a lot of SIGCHLD signals rapidly while logging, could die

Summary:	CVE-2010-3780 Dovecot: Busy master process, receiving a lot of SIGCHLD signal...

Status:	CLOSED ERRATA

Aliases:	CVE-2010-3780

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:	Ales Zelinka
Docs Contact:

URL:
Whiteboard:	public=20101006,reported=20101006,sou...
Keywords:	Security

Depends On:	654226
Blocks:
	Show dependency tree / graph

Reported:	2010-10-08 04:49 EDT by Jan Lieskovsky
Modified:	2011-05-19 10:04 EDT (History)
CC List:	4 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-05-19 10:04:36 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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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0600	normal	SHIPPED_LIVE	Moderate: dovecot security and enhancement update	2011-05-19 07:47:01 EDT

Groups: None (edit)

Description Jan Lieskovsky 2010-10-08 04:49:25 EDT

Common Vulnerabilities and Exposures assigned an identifier CVE-2010-3780 to
the following vulnerability:

Dovecot 1.2.x before 1.2.15 allows remote authenticated users to cause
a denial of service (master process outage) by simultaneously
disconnecting many (1) IMAP or (2) POP3 sessions.

References:
[1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3780
[2] http://www.dovecot.org/list/dovecot/2010-October/053450.html

Upstream changeset:
[3] http://hg.dovecot.org/dovecot-1.2/rev/e67b892c9ff3

Comment 1 Jan Lieskovsky 2010-10-08 04:52:09 EDT

This issue did NOT affect the versions of the dovecot package, as shipped
with Red Hat Enterprise Linux 4 and 5.

--

This issue does NOT affect the versions of the dovecot package, as shipped
with Fedora release of 12 and 13 (relevant packages are already updated).

Comment 4 Karel Volný 2011-01-26 11:27:49 EST

do we have any realiable reproducer? - "Dovecot master process *could have* died if ..." doesn't sound too convincing to me

Comment 5 Michal Hlavinka 2011-01-27 03:00:18 EST

(In reply to comment #4)
> do we have any realiable reproducer? - "Dovecot master process *could have*
> died if ..." doesn't sound too convincing to me

I'm not aware of such reliable reproducer. You'll need to have a lot of connections at the same time (in theory 3, but not with idle master process) and still there's only (medium) chance, no guarantee.

Comment 6 Karel Volný 2011-01-27 08:48:00 EST

(In reply to comment #5)
> (In reply to comment #4)
> > do we have any realiable reproducer? - "Dovecot master process *could have*
> > died if ..." doesn't sound too convincing to me
> 
> I'm not aware of such reliable reproducer. You'll need to have a lot of
> connections at the same time (in theory 3, but not with idle master process)
> and still there's only (medium) chance, no guarantee.

thanks for the info

so this'd be SanityOnly, no testcase will be written

Comment 10 errata-xmlrpc 2011-05-19 07:47:07 EDT

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0600 https://rhn.redhat.com/errata/RHSA-2011-0600.html

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