CVE-2014-5206
Ubuntu Security Notice USN-2318-1
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.
La función do_remount en fs/namespace.c en el kernel de Linux hasta 3.16.1 no mantiene el bit MNT_LOCK_READONLY durante el remontaje de un montaje bind, lo que permite a usuarios locales evadir las restricciones de sólo lectura y vencer ciertos mecanismos de protección sandbox a través de un comando 'mount -o remount' dentro de un espacio para el nombre del usuario.
Eric W. Biederman discovered a flaw with the mediation of mount flags in the Linux kernel's user namespace subsystem. An unprivileged user could exploit this flaw to by-pass mount restrictions, and potentially gain administrative privileges. Kenton Varda discovered a flaw with read-only bind mounds when used with user namespaces. An unprivileged local user could exploit this flaw to gain full write privileges to a mount that should be read only. Various other issues were also addressed.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2014-08-13 CVE Reserved
- 2014-08-18 CVE Published
- 2024-08-06 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-269: Improper Privilege Management
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a6138db815df5ee542d848318e5dae681590fccd | X_refsource_confirm | |
| http://www.openwall.com/lists/oss-security/2014/08/13/4 | Mailing List |
|
| http://www.securityfocus.com/bid/69214 | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1129662 | 2023-11-07 | |
| https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd | 2023-11-07 |
| URL | Date | SRC |
|---|---|---|
| http://www.ubuntu.com/usn/USN-2317-1 | 2023-11-07 | |
| http://www.ubuntu.com/usn/USN-2318-1 | 2023-11-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.8 < 3.10.55 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.8 < 3.10.55" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.11 < 3.12.27 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.11 < 3.12.27" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 3.14.19 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 3.14.19" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 3.16.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 3.16.3" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04" | esm |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | esm |
Affected
| ||||||