Red Hat Bugzilla – Full Text Bug Listing
|Summary:||CVE-2012-4545 elinks: Improper delegation of client credentials during GSS negotiation|
|Product:||[Other] Security Response||Reporter:||Jan Lieskovsky <jlieskov>|
|Component:||vulnerability||Assignee:||Red Hat Product Security <security-response-team>|
|Status:||CLOSED ERRATA||QA Contact:|
|Version:||unspecified||CC:||jrusnack, kdudka, myllynen, ovasik, security-response-team|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2013-02-12 01:22:25 EST||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Bug Depends On:||863066, 891566, 891692, 891693, 891694, 891695|
Description Jan Lieskovsky 2012-10-09 11:20:09 EDT
It was found that Elinks performed client credentials delegation during the client-to-server GSS security mechanisms negotiation. A remote, rogue server could use this flaw to impersonate the Elinks client (victim) against the correct (originally intended) server, potentially leading to denial of Elinks tool services for victim client.
Comment 1 Jan Lieskovsky 2012-10-09 11:22:07 EDT
This issue affects the versions of the elinks package, as shipped with Red Hat Enterprise Linux 5 and 6. -- This issue affects the versions of the elinks package, as shipped with Fedora release of 16 and 17.
Comment 2 Jan Lieskovsky 2012-10-09 11:25:16 EDT
This issue was discovered by Marko Myllynen of Red Hat.
Comment 4 Jan Lieskovsky 2012-10-09 11:46:24 EDT
Created attachment 624175 [details] Proposed patch from Kamil Dudka to disable credentials delegation during GSS negotiation
Comment 7 Kamil Dudka 2012-10-23 07:00:22 EDT
I am working on a new version of the patch, will provide some update shortly.
Comment 8 Kamil Dudka 2012-10-23 08:20:22 EDT
Created attachment 632061 [details] [PATCH] http_negotiate: do not delegate GSSAPI credentials by default I have proposed a new version of the patch upstream.
Comment 9 Kamil Dudka 2012-10-25 06:53:45 EDT
Created attachment 633270 [details] fixes supposed to go out with the security advisory An upstream patch allowing to configure trusted servers is going to be applied later, together with some other fixes related to the HTTP authentication.
Comment 11 Kamil Dudka 2012-10-29 11:54:03 EDT
Created attachment 635073 [details] RHEL-5 backport of the upstream security fixes
Comment 12 Kamil Dudka 2012-10-29 11:54:43 EDT
Created attachment 635074 [details] RHEL-6 backport of the upstream security fixes
Comment 20 Jan Lieskovsky 2013-01-03 04:59:48 EST
References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4545 http://bugzilla.elinks.cz/show_bug.cgi?id=1124 http://repo.or.cz/w/elinks.git/commitdiff/da18694ff7dd0b67dfcb3c417fb0579b1e7d02d7 http://www.debian.org/security/2012/dsa-2592 http://www.securityfocus.com/bid/57065 http://secunia.com/advisories/51569 http://xforce.iss.net/xforce/xfdb/80882
Comment 21 Jan Lieskovsky 2013-01-03 05:01:14 EST
Created elinks tracking bugs for this issue Affects: fedora-all [bug 891566]
Comment 25 Fedora Update System 2013-01-13 23:05:20 EST
elinks-0.12-0.32.pre5.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
Comment 26 Fedora Update System 2013-01-13 23:19:10 EST
elinks-0.12-0.29.pre5.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
Comment 30 Murray McAllister 2013-02-05 19:50:04 EST
Acknowledgements: This issue was discovered by Marko Myllynen of Red Hat.