NULL Pointer Dereference Affecting kernel package, versions <0:4.4.39-34.54.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
- disclosed28 Nov 2016
Introduced: 28 Nov 2016
CVE-2016-8650 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 kernel to version 0:4.4.39-34.54.amzn1 or higher.
This issue was patched in ALAS-2017-782.
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 mpi_powm function in lib/mpi/mpi-pow.c in the Linux kernel through 4.8.11 does not ensure that memory is allocated for limb data, which allows local users to cause a denial of service (stack memory corruption and panic) via an add_key system call for an RSA key with a zero exponent.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8650
- https://access.redhat.com/security/cve/CVE-2016-8650
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f5527fffff3f002b0a6b376163613b82f69de073
- http://seclists.org/fulldisclosure/2016/Nov/76
- http://www.openwall.com/lists/oss-security/2016/11/24/8
- http://www.securityfocus.com/bid/94532
- http://www.securitytracker.com/id/1037968
- https://access.redhat.com/errata/RHSA-2017:0931
- https://access.redhat.com/errata/RHSA-2017:0932
- https://access.redhat.com/errata/RHSA-2017:0933
- https://access.redhat.com/errata/RHSA-2018:1854
- https://bugzilla.redhat.com/show_bug.cgi?id=1395187
- https://github.com/torvalds/linux/commit/f5527fffff3f002b0a6b376163613b82f69de073
- https://source.android.com/security/bulletin/2017-03-01.html