CVE-2011-1831
First published: Tue Aug 09 2011(Updated: )
A number of flaws were reported [1] in eCryptfs that could allow a user to mount or unmount arbitrary locations, and possibly disclose confidential information: Vasiliy Kulikov of Openwall and Dan Rosenberg discovered that eCryptfs incorrectly validated permissions on the requested mountpoint. A local attacker could use this flaw to mount to arbitrary locations, leading to privilege escalation. (<a href="https://access.redhat.com/security/cve/CVE-2011-1831">CVE-2011-1831</a>) Vasiliy Kulikov of Openwall and Dan Rosenberg discovered that eCryptfs incorrectly validated permissions on the requested mountpoint. A local attacker could use this flaw to unmount to arbitrary locations, leading to a denial of service. (<a href="https://access.redhat.com/security/cve/CVE-2011-1832">CVE-2011-1832</a>) Vasiliy Kulikov of Openwall and Dan Rosenberg discovered that eCryptfs incorrectly validated permissions on the requested source directory. A local attacker could use this flaw to mount an arbitrary directory, possibly leading to information disclosure. Note that this flaw also requires a fix in the kernel to be complete. (<a href="https://access.redhat.com/security/cve/CVE-2011-1833">CVE-2011-1833</a>) Dan Rosenberg and Marc Deslauriers discovered that eCryptfs incorrectly handled modifications to the mtab file when an error occurs. A local attacker could use this flaw to corrupt the mtab file, and possibly unmount arbitrary locations, leading to a denial of service. (<a href="https://access.redhat.com/security/cve/CVE-2011-1834">CVE-2011-1834</a>) Marc Deslauriers discovered that eCryptfs incorrectly handled keys when setting up an encrypted private directory. A local attacker could use this flaw to manipulate keys during creation of a new user. (<a href="https://access.redhat.com/security/cve/CVE-2011-1835">CVE-2011-1835</a>) Marc Deslauriers discovered that eCryptfs incorrectly handled permissions during recovery. A local attacker could use this flaw to possibly access another user's data during the recovery process. (<a href="https://access.redhat.com/security/cve/CVE-2011-1836">CVE-2011-1836</a>) Vasiliy Kulikov of Openwall discovered that eCryptfs incorrectly handled lock counters. A local attacker could use this flaw to possibly overwrite arbitrary files. (<a href="https://access.redhat.com/security/cve/CVE-2011-1837">CVE-2011-1837</a>) [1] <a href="https://launchpad.net/bugs/732628">https://launchpad.net/bugs/732628</a>
Credit: security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ecryptfs Ecryptfs-utils | =68 | |
| Ecryptfs Ecryptfs-utils | =62 | |
| Ecryptfs Ecryptfs-utils | =74 | |
| Ecryptfs Ecryptfs-utils | =87 | |
| Ecryptfs Ecryptfs-utils | =82 | |
| Ecryptfs Ecryptfs-utils | =86 | |
| Ecryptfs Ecryptfs-utils | =80 | |
| Ecryptfs Ecryptfs-utils | =65 | |
| Ecryptfs Ecryptfs-utils | =79 | |
| Ecryptfs Ecryptfs-utils | =83 | |
| Ecryptfs Ecryptfs-utils | =72 | |
| Ecryptfs Ecryptfs-utils | =69 | |
| Ecryptfs Ecryptfs-utils | =63 | |
| Ecryptfs Ecryptfs-utils | =64 | |
| Ecryptfs Ecryptfs Utils | =60 | |
| Ecryptfs Ecryptfs Utils | =58 | |
| Ecryptfs Ecryptfs-utils | =70 | |
| Ecryptfs Ecryptfs-utils | =77 | |
| Ecryptfs Ecryptfs Utils | =61 | |
| Ecryptfs Ecryptfs-utils | =76 | |
| Ecryptfs Ecryptfs-utils | =75 | |
| Ecryptfs Ecryptfs-utils | =71 | |
| Ecryptfs Ecryptfs-utils | =85 | |
| Ecryptfs Ecryptfs-utils | =78 | |
| Ecryptfs Ecryptfs-utils | <=89 | |
| Ecryptfs Ecryptfs-utils | =84 | |
| Ecryptfs Ecryptfs-utils | =67 | |
| Ecryptfs Ecryptfs-utils | =81 | |
| Ecryptfs Ecryptfs-utils | =73 | |
| Ecryptfs Ecryptfs-utils | =66 | |
| Ecryptfs Ecryptfs Utils | =59 | |
| debian/ecryptfs-utils | 111-5 111-6 111-7 |
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Reference Links
- https://launchpad.net/ecryptfs/+download
- https://bugzilla.redhat.com/show_bug.cgi?id=729465
- http://www.ubuntu.com/usn/USN-1188-1
- http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00009.html
- https://launchpad.net/bugs/cve/CVE-2011-1831
- https://access.redhat.com/security/cve/CVE-2011-1831
- https://access.redhat.com/security/cve/CVE-2011-1832
- https://access.redhat.com/security/cve/CVE-2011-1833
- https://access.redhat.com/security/cve/CVE-2011-1834
- https://access.redhat.com/security/cve/CVE-2011-1835
- https://access.redhat.com/security/cve/CVE-2011-1836
- https://access.redhat.com/security/cve/CVE-2011-1837
- https://launchpad.net/bugs/732628
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517480&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517480&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517481&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517481&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517482&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517482&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517483&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517483&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517484&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517484&action=edit
- https://launchpad.net/ubuntu/+source/ecryptfs-utils/89-0ubuntu2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=729474
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517492&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=517492&action=edit
- https://launchpad.net/ubuntu/+source/ecryptfs-utils/83-0ubuntu3.2.10.04.1
- http://git.kernel.org/?p=linux/kernel/git/ecryptfs/ecryptfs-2.6.git;a=commit;h=764355487ea220fdc2faf128d577d7f679b91f97
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=730964
- https://rhn.redhat.com/errata/RHSA-2011-1241.html
- https://security-tracker.debian.org/tracker/CVE-2011-1831
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1831
- https://nvd.nist.gov/vuln/detail/CVE-2011-1831
- https://ubuntu.com/security/CVE-2011-1831
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