NULL Pointer Dereference Affecting kernel package, versions <0:4.9.62-21.56.amzn1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Sept 2021
- disclosed22 Nov 2017
Introduced: 22 Nov 2017
CVE-2017-12193 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 kernel to version 0:4.9.62-21.56.amzn1 or higher.
This issue was patched in ALAS-2017-925.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.
The assoc_array_insert_into_terminal_node function in lib/assoc_array.c in the Linux kernel before 4.13.11 mishandles node splitting, which allows local users to cause a denial of service (NULL pointer dereference and panic) via a crafted application, as demonstrated by the keyring key type, and key addition and link creation operations.
References
- http://www.securityfocus.com/bid/101678
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea6789980fdaa610d7eb63602c746bf6ec70cd2b
- https://bugzilla.redhat.com/show_bug.cgi?id=1501215
- https://github.com/torvalds/linux/commit/ea6789980fdaa610d7eb63602c746bf6ec70cd2b
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12193
- https://access.redhat.com/errata/RHSA-2018:0151
- https://usn.ubuntu.com/3698-1/
- https://usn.ubuntu.com/3698-2/
- https://access.redhat.com/errata/RHSA-2018:0152
- https://access.redhat.com/errata/RHSA-2018:0181
- https://access.redhat.com/security/cve/CVE-2017-12193