SB2013050306 - Permissions, Privileges, and Access Controls in Linux kernel
Published: May 3, 2013 Updated: August 11, 2020
Security Bulletin ID
SB2013050306
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2013-1959)
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.
References
- 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