Input validation error in Linux kernel - CVE-2013-7271
Published: January 6, 2014 / Updated: August 10, 2020
Vulnerability identifier: #VU42189
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2013-7271
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.
How to mitigate CVE-2013-7271
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
- http://secunia.com/advisories/55882
- http://secunia.com/advisories/56036
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4
- http://www.openwall.com/lists/oss-security/2013/12/31/7
- http://www.securityfocus.com/bid/64746
- http://www.ubuntu.com/usn/USN-2109-1
- http://www.ubuntu.com/usn/USN-2110-1
- http://www.ubuntu.com/usn/USN-2113-1
- http://www.ubuntu.com/usn/USN-2117-1
- http://www.ubuntu.com/usn/USN-2128-1
- http://www.ubuntu.com/usn/USN-2129-1
- http://www.ubuntu.com/usn/USN-2135-1
- http://www.ubuntu.com/usn/USN-2136-1
- http://www.ubuntu.com/usn/USN-2138-1
- http://www.ubuntu.com/usn/USN-2139-1
- http://www.ubuntu.com/usn/USN-2141-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1039845
- https://exchange.xforce.ibmcloud.com/vulnerabilities/90132
- https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c