|Summary:||CVE-2012-5644 libuser: (Complete) Information disclosure when moving user's home directory|
|Product:||[Other] Security Response||Reporter:||Jan Lieskovsky <jlieskov>|
|Component:||vulnerability||Assignee:||Red Hat Product Security <security-response-team>|
|Status:||CLOSED WONTFIX||QA Contact:|
|Version:||unspecified||CC:||fweimer, mitr, security-response-team, sonu.khan|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2015-08-22 16:06:04 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Cloudforms Team:||---||Target Upstream Version:|
|Bug Depends On:||928846|
|Bug Blocks:||1802635, 884691|
Description Jan Lieskovsky 2012-12-10 13:41:13 UTC
An information disclosure flaw was found in the way libuser, an user and group account administration library, performed movement of user's home directory. Previously, during the move the ownership of all the (sub)entries present in directory tree, to be moved, were changed from privileged user account to the effective user id of the user, the home directory should belong to. A local attacker could use this flaw to conduct hardlink attacks and possibly obtain unauthorized access to arbitrary system file. This issue was found by Miloslav Trmač of Red Hat.
Comment 1 Jan Lieskovsky 2012-12-10 13:46:33 UTC
This issue affects the versions of the libuser package, as shipped with Red Hat Enterprise Linux 5 and 6. -- This issue affects the versions of the libuser package, as shipped with Fedora release of 16 and 17.
Comment 6 Huzaifa S. Sidhpurwala 2013-03-28 15:03:50 UTC
Created libuser tracking bugs for this issue Affects: fedora-all [bug 928846]
Comment 7 Huzaifa S. Sidhpurwala 2013-04-04 10:57:38 UTC
CVE-2012-5630 and CVE-2012-5644 were addressed upstream via the following set of commits (This also includes a some code refactoring, functionality changes and some minor cleanups): https://fedorahosted.org/libuser/changeset?reponame=&old=cd5a8babd110b138d40fe0d51da2e7d18069eca6%40&new=4a8a1c1c5cf4611bfbdb5d23b51b1a4110112b97%40 https://fedorahosted.org/libuser/changeset?reponame=&old=ae3646e9ed8acea5aa64b4c35f8e2e015696093c%40&new=d094070cab7f717a5d2b17bde0a4795fab9d7239%40 Minimal backport to fedora version of libuser avoiding other code cleanups: http://pkgs.fedoraproject.org/cgit/libuser.git/tree/libuser-dirtree-TOCTOU-fix.patch?id=78a55bf498cac0b430ba6512654860c39dfd0bf9
Comment 9 Vincent Danen 2015-08-22 16:05:52 UTC
Statement: Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 11 Sonu Khan 2020-01-28 13:25:29 UTC
Is there any steps for mitigation that we can apply for a workaround? Also share steps for reproduction.
Comment 12 Miloslav Trmač 2020-01-28 13:31:28 UTC
(In reply to Sonu Khan from comment #11) > Is there any steps for mitigation that we can apply for a workaround? > Also share steps for reproduction. I don’t think we typically share reproducers, anyway please contact Product Security at email@example.com .