Vulnerability identifier: #VU42187
Vulnerability risk: Medium
CVSSv4.0: 4.6 [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:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The nr_recvmsg function in net/netrom/af_netrom.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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 3.0 - 3.0.68, 3.1 - 3.12.2, 3.2 - 3.2.30, 3.3 - 3.3.8, 3.4 - 3.4.32, 3.5.1 - 3.5.7, 3.6 - 3.6.11, 3.7 - 3.7.10, 3.8.0 - 3.8.13, 3.9 - 3.9.11
External links
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
https://secunia.com/advisories/55882
https://secunia.com/advisories/56036
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4
https://www.openwall.com/lists/oss-security/2013/12/31/7
https://www.securityfocus.com/bid/64742
https://www.ubuntu.com/usn/USN-2109-1
https://www.ubuntu.com/usn/USN-2110-1
https://www.ubuntu.com/usn/USN-2113-1
https://www.ubuntu.com/usn/USN-2117-1
https://www.ubuntu.com/usn/USN-2128-1
https://www.ubuntu.com/usn/USN-2129-1
https://www.ubuntu.com/usn/USN-2135-1
https://www.ubuntu.com/usn/USN-2136-1
https://www.ubuntu.com/usn/USN-2138-1
https://www.ubuntu.com/usn/USN-2139-1
https://www.ubuntu.com/usn/USN-2141-1
https://bugzilla.redhat.com/show_bug.cgi?id=1039845
https://exchange.xforce.ibmcloud.com/vulnerabilities/90130
https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.