Detections
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CVE-2017-15129
medium
Description
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.
References
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11
https://usn.ubuntu.com/3632-1/
https://usn.ubuntu.com/3619-2/
https://usn.ubuntu.com/3619-1/
https://usn.ubuntu.com/3617-3/
https://usn.ubuntu.com/3617-2/
https://usn.ubuntu.com/3617-1/
https://marc.info/?t=151370468900001&r=1&w=2
https://marc.info/?l=linux-netdev&m=151370451121029&w=2
https://github.com/torvalds/linux/commit/21b5944350052d2583e82dd59b19a9ba94a007f0
https://bugzilla.redhat.com/show_bug.cgi?id=1531174
https://access.redhat.com/security/cve/CVE-2017-15129
https://access.redhat.com/errata/RHSA-2019:1946
https://access.redhat.com/errata/RHSA-2018:1062
https://access.redhat.com/errata/RHSA-2018:0676
https://access.redhat.com/errata/RHSA-2018:0654