Bug 1727756 (CVE-2019-13233) - CVE-2019-13233 kernel: use-after-free in arch/x86/lib/insn-eval.c
Summary: CVE-2019-13233 kernel: use-after-free in arch/x86/lib/insn-eval.c
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-13233
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: 1728558 1728559 1727757 1728560 1728561
Blocks: 1727758
TreeView+ depends on / blocked
 
Reported: 2019-07-08 06:15 UTC by Dhananjay Arunesh
Modified: 2019-11-06 00:53 UTC (History)
42 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the arch/x86/lib/insn-eval.c function in the Linux kernel. An attacker could corrupt the memory due to a flaw in use-after-free access to an LDT entry caused by a race condition between modify_ldt() and a #BR exception for an MPX bounds violation.
Clone Of:
Environment:
Last Closed: 2019-11-06 00:53:00 UTC


Attachments (Terms of Use)


Links
System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:3309 None None None 2019-11-05 20:35:40 UTC
Red Hat Product Errata RHSA-2019:3517 None None None 2019-11-05 21:06:22 UTC

Description Dhananjay Arunesh 2019-07-08 06:15:07 UTC
A vulnerability was found in arch/x86/lib/insn-eval.c in the Linux kernel, there is a
use-after-free for access to an LDT entry because of a race condition between
modify_ldt() and a #BR exception for an MPX bounds violation.

Reference:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.9
https://bugs.chromium.org/p/project-zero/issues/detail?id=1879

Upstream commit:
https://github.com/torvalds/linux/commit/de9f869616dd95e95c00bdd6b0fcd3421e8a4323
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=de9f869616dd95e95c00bdd6b0fcd3421e8a4323

Comment 1 Dhananjay Arunesh 2019-07-08 06:15:24 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1727757]

Comment 2 Justin M. Forbes 2019-07-08 12:40:32 UTC
This was fixed for Fedora with the 5.1.9 stable updates.

Comment 8 errata-xmlrpc 2019-11-05 20:35:38 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3309 https://access.redhat.com/errata/RHSA-2019:3309

Comment 9 errata-xmlrpc 2019-11-05 21:06:20 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3517 https://access.redhat.com/errata/RHSA-2019:3517

Comment 10 Product Security DevOps Team 2019-11-06 00:53:00 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-2019-13233


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