CVE-2018-1091

In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 4.9 MEDIUM

5.5^/10

CVSS v3.0 : MEDIUM

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.9^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:N/I:N/A:C

Exploitability : 3.9 / Impact : 6.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5	Patch Vendor Advisory
https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70	Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1558149	Issue Tracking Third Party Advisory
https://access.redhat.com/security/cve/cve-2018-1091	Third Party Advisory
http://openwall.com/lists/oss-security/2018/03/27/4	Mailing List Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70	Patch Vendor Advisory
https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2	Patch Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1318

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Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Information

Published : 2018-03-27 14:29

Updated : 2018-05-09 18:29

NVD link : CVE-2018-1091

Mitre link : CVE-2018-1091

JSON object : View

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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Products Affected

linux

linux_kernel

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