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Bug 1622004 - (CVE-2018-14619) CVE-2018-14619 kernel: crash (possible privesc) in kernel crypto api.
CVE-2018-14619 kernel: crash (possible privesc) in kernel crypto api.
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20180828,repo...
: Security
Depends On: 1600394 1622435 1622436 1622836 1623767
Blocks: 1615186
  Show dependency tree / graph
 
Reported: 2018-08-24 02:38 EDT by Wade Mealing
Modified: 2018-10-30 05:05 EDT (History)
41 users (show)

See Also:
Fixed In Version: kernel-4.15-rc4
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the crypto subsystem that allowed an attacker to crash the system or possibly escalate privileges with a specially crafted program.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2948 None None None 2018-10-30 05:05 EDT

  None (edit)
Description Wade Mealing 2018-08-24 02:38:31 EDT 
A flaw was found in the crypto subsystem of the Linux kernel.

The "null skcipher" was being by dropped in the wrong place -- when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use.

This may grant a local user to be able to crash the machine and possible corrupt memory leading to privilege escalation.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc
Comment 6 Wade Mealing 2018-08-28 03:31:58 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1622836]
Comment 7 Justin M. Forbes 2018-08-28 08:12:15 EDT 
This issue was fixed for Fedora with the 4.14.8 stable kernel update.
Comment 8 Petr Matousek 2018-10-17 10:04:59 EDT 
Acknowledgments:

Name: Florian Weimer (Red Hat), Ondrej Mosnacek (Red Hat)
Comment 9 errata-xmlrpc 2018-10-30 05:04:45 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948
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