Bug 1017983 (CVE-2013-4421)

Summary: CVE-2013-4421 dropbear: memory exhaustion DoS via large decompressed payloads
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: buytenh, i, itamar, ratulg
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20130508,reported=20131010,source=oss-security,cvss2=4.3/AV:N/AC:M/Au:N/C:N/I:N/A:P,fedora-all/dropbear=affected,epel-all/dropbear=affected
Fixed In Version: dropbear 2013.59 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-11-04 03:55:54 EST Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Bug Depends On: 1017985, 1017986    
Bug Blocks:    

Description Vincent Danen 2013-10-10 18:08:51 EDT
It was reported [1] that versions of dropbear prior to 2013.59 suffered from a flaw where large decompressed payloads could cause memory exhaustion, resulting in a denial of service.

This has been fixed in git [2].  A CVE assignment is pending [3].

[1] https://matt.ucc.asn.au/dropbear/CHANGES
[2] https://secure.ucc.asn.au/hg/dropbear/rev/0bf76f54de6f
[3] http://www.openwall.com/lists/oss-security/2013/10/10/15
Comment 1 Vincent Danen 2013-10-10 18:11:34 EDT
Created dropbear tracking bugs for this issue:

Affects: fedora-all [bug 1017985]
Affects: epel-all [bug 1017986]
Comment 2 Fedora Update System 2013-10-18 15:48:06 EDT
dropbear-2013.59-1.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 3 Fedora Update System 2013-10-18 15:53:12 EDT
dropbear-2013.59-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 4 Fedora Update System 2013-10-25 13:38:39 EDT
dropbear-2013.59-1.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.