CVE-2014-5045
kernel: vfs: refcount issues during unmount on symlink
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
The mountpoint_last function in fs/namei.c in the Linux kernel before 3.15.8 does not properly maintain a certain reference count during attempts to use the umount system call in conjunction with a symlink, which allows local users to cause a denial of service (memory consumption or use-after-free) or possibly have unspecified other impact via the umount program.
La función mountpoint_last en fs/namei.c en el kernel de Linux anterior a 3.15.8 no mantiene debidamente cierta cuenta de referencias durante intentos de utilizar la llamada al sistema umount en conjunto con un enlace simbólico, lo que permite a usuarios locales causar una denegación de servicio (consumo de memoria o uso después de liberación) o posiblemente tener otro impacto no especificado a través del programa umount.
A flaw was found in the way the Linux kernel's VFS subsystem handled reference counting when performing unmount operations on symbolic links. A local, unprivileged user could use this flaw to exhaust all available memory on the system or, potentially, trigger a use-after-free error, resulting in a system crash or privilege escalation.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2014-07-23 CVE Reserved
- 2014-08-01 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-06 CVE Updated
- 2024-08-06 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-59: Improper Link Resolution Before File Access ('Link Following')
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=295dc39d941dc2ae53d5c170365af4c9d5c16212 | X_refsource_confirm | |
| http://secunia.com/advisories/60353 | Third Party Advisory | |
| http://www.openwall.com/lists/oss-security/2014/07/24/2 | Mailing List |
|
| http://www.securityfocus.com/bid/68862 | Third Party Advisory |
| URL | Date | SRC |
|---|---|---|
| https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212 | 2024-08-06 |
| URL | Date | SRC |
|---|---|---|
| http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8 | 2023-11-07 |
| URL | Date | SRC |
|---|---|---|
| http://rhn.redhat.com/errata/RHSA-2015-0062.html | 2023-11-07 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1122472 | 2015-01-20 | |
| https://access.redhat.com/security/cve/CVE-2014-5045 | 2015-01-20 |
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" | < 3.15.8 Search vendor "Linux" for product "Linux Kernel" and version " < 3.15.8" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 6.5 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "6.5" | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 6.5 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "6.5" | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 6.5 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "6.5" | - |
Affected
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