Bug 1735630 (CVE-2019-13648) - CVE-2019-13648 kernel: denial of service in arch/powerpc/kernel/signal_32.c and arch/powerpc/kernel/signal_64.c via sigreturn() system call
Summary: CVE-2019-13648 kernel: denial of service in arch/powerpc/kernel/signal_32.c a...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-13648
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1735631 1802829 1802830 1802832 1802833 1837073
Blocks: 1732753 1732823 1735632
TreeView+ depends on / blocked
 
Reported: 2019-08-01 07:43 UTC by Dhananjay Arunesh
Modified: 2020-07-21 19:27 UTC (History)
46 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the PowerPc platform, where the kernel will panic if the transactional memory is disabled. An attacker could use this flaw to panic the system by constructing a signal context through the transactional memory MSR bits set.
Clone Of:
Environment:
Last Closed: 2020-07-21 19:27:41 UTC

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:1016 0 None None None 2020-03-31 19:11:57 UTC
Red Hat Product Errata RHSA-2020:3019 0 None None None 2020-07-21 13:41:16 UTC

Description Dhananjay Arunesh 2019-08-01 07:43:28 UTC 
A vulnerability was found in on the powerpc platform, when hardware transactional memory is disabled, a local user can cause a denial of service (Transaction Memory exception and system crash) via a sigreturn() system call that sends a crafted signal frame. This affects arch/powerpc/kernel/signal_32.c and arch/powerpc/kernel/signal_64.c.

Reference:
https://patchwork.ozlabs.org/patch/1133904/
https://git.kernel.org/torvalds/c/f16d80b75a096c52354c6e0a574993f3b0dfbdfe
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/testing/selftests/powerpc/signal/sigfuz.c?h=v5.2
Comment 1 Dhananjay Arunesh 2019-08-01 07:43:55 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1735631]
Comment 5 Wade Mealing 2020-02-14 01:10:11 UTC 
Red hat Enterprise Linux 7 kernels before kernel-3.10.0-1065.el7 were affected by this flaw.
Comment 9 errata-xmlrpc 2020-03-31 19:11:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1016 https://access.redhat.com/errata/RHSA-2020:1016
Comment 12 errata-xmlrpc 2020-07-21 13:41:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Extended Update Support

Via RHSA-2020:3019 https://access.redhat.com/errata/RHSA-2020:3019
Comment 13 Product Security DevOps Team 2020-07-21 19:27:41 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-13648
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