CVE-2012-5644: Infoleak
First published: Mon Dec 10 2012(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libuser Project Libuser | ||
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Fedoraproject Fedora | =18 | |
| Redhat Enterprise Linux | =5.0 | |
| Redhat Enterprise Linux | =6.0 | |
| debian/libuser | 1:0.62~dfsg-0.4 1:0.64~dfsg-1 1:0.64~dfsg-2 |
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Reference Links
- http://lists.fedoraproject.org/pipermail/package-announce/2013-April/102068.html
- https://access.redhat.com/security/cve/cve-2012-5644
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-5644
- https://security-tracker.debian.org/tracker/CVE-2012-5644
- https://bugzilla.redhat.com/show_bug.cgi?id=885724#c7
- https://access.redhat.com/security/cve/CVE-2012-5644
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=928846
- https://access.redhat.com/security/cve/CVE-2012-5630
- https://fedorahosted.org/libuser/changeset?reponame=&old=cd5a8babd110b138d40fe0d51da2e7d18069eca6%40&new=4a8a1c1c5cf4611bfbdb5d23b51b1a4110112b97%40
- https://fedorahosted.org/libuser/changeset?reponame=&old=ae3646e9ed8acea5aa64b4c35f8e2e015696093c%40&new=d094070cab7f717a5d2b17bde0a4795fab9d7239%40
- http://pkgs.fedoraproject.org/cgit/libuser.git/tree/libuser-dirtree-TOCTOU-fix.patch?id=78a55bf498cac0b430ba6512654860c39dfd0bf9
- https://access.redhat.com/security/updates/classification/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=885724#c11
- https://bugzilla.redhat.com/show_bug.cgi?id=885724
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