CVE-2017-15129

Published: 9 January 2018

A use-after-free vulnerability was found in network namespaces code affecting the Linux kernel before 4.14.11. The function get_net_ns_by_id() in net/core/net_namespace.c does not check for the net::count value after it has found a peer network in netns_ids idr, which could lead to double free and memory corruption. This vulnerability could allow an unprivileged local user to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is thought to be unlikely.

From the Ubuntu Security Team

It was discovered that a use-after-free vulnerability existed in the network namespaces implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Status

Severity score breakdown

References

• https://git.kernel.org/linus/21b5944350052d2583e82dd59b19a9ba94a007f0
• https://ubuntu.com/security/notices/USN-3617-1
• https://ubuntu.com/security/notices/USN-3617-2
• https://ubuntu.com/security/notices/USN-3617-3
• https://ubuntu.com/security/notices/USN-3619-1
• https://ubuntu.com/security/notices/USN-3619-2
• https://ubuntu.com/security/notices/USN-3632-1
• https://www.cve.org/CVERecord?id=CVE-2017-15129
• NVD
• Launchpad
• Debian