#VU42849 Permissions, Privileges, and Access Controls in Linux kernel - CVE-2013-1959
Published: May 3, 2013 / Updated: August 11, 2020
Vulnerability identifier: #VU42849
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2013-1959
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
kernel/user_namespace.c in the Linux kernel before 3.8.9 does not have appropriate capability requirements for the uid_map and gid_map files, which allows local users to gain privileges by opening a file within an unprivileged process and then modifying the file within a privileged process.
Remediation
Install update from vendor's website.
External links
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6708075f104c3c9b04b23336bb0366ca30c3931b
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e3211c120a85b792978bcb4be7b2886df18d27f0
- http://www.exploit-db.com/exploits/25307
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.9
- http://www.openwall.com/lists/oss-security/2013/04/29/1
- https://github.com/torvalds/linux/commit/6708075f104c3c9b04b23336bb0366ca30c3931b
- https://github.com/torvalds/linux/commit/e3211c120a85b792978bcb4be7b2886df18d27f0