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CVE-2014-5045

Date: August 1, 2014

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.

Language: C

Severity Score

Related Resources (12)

http://www.securityfocus.com/bid/68862
https://people.canonical.com/~ubuntu-security/cve/CVE-2014-5045
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.8
https://github.com/torvalds/linux/commit/295dc39d941dc2ae53d5c170365af4c9d5c16212
http://rhn.redhat.com/errata/RHSA-2015-0062.html
http://secunia.com/advisories/60353
http://www.openwall.com/lists/oss-security/2014/07/24/2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=295dc39d941dc2ae53d5c170365af4c9d5c16212
https://access.redhat.com/security/cve/CVE-2014-5045
https://nvd.nist.gov/vuln/detail/CVE-2014-5045
https://bugzilla.redhat.com/show_bug.cgi?id=1122472
https://www.mend.io/vulnerability-database/CVE-2014-5045

Severity Score

Weakness Type (CWE)

Improper Link Resolution Before File Access ('Link Following')

CWE-59

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): HIGH
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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