Executive Summary

Informations
NameCVE-2018-18281First vendor Publication2018-10-30
VendorCveLast vendor Modification2019-04-23

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score4.6Attack RangeLocal
Cvss Impact Score6.4Attack ComplexityLow
Cvss Expoit Score3.9AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18281

CWE : Common Weakness Enumeration

%idName
100 %CWE-20Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Os5
Os1
Os1352

Sources (Detail)

SourceUrl
BID http://www.securityfocus.com/bid/105761
http://www.securityfocus.com/bid/106503
CONFIRM https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id...
MISC http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html
https://bugs.chromium.org/p/project-zero/issues/detail?id=1695
MLIST http://www.openwall.com/lists/oss-security/2018/10/29/5
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
REDHAT https://access.redhat.com/errata/RHSA-2019:0831
UBUNTU https://usn.ubuntu.com/3832-1/
https://usn.ubuntu.com/3835-1/
https://usn.ubuntu.com/3871-1/
https://usn.ubuntu.com/3871-3/
https://usn.ubuntu.com/3871-4/
https://usn.ubuntu.com/3871-5/
https://usn.ubuntu.com/3880-1/
https://usn.ubuntu.com/3880-2/

Alert History

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DateInformations
2019-04-23 21:19:15
  • Multiple Updates
2019-04-05 00:18:58
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2019-04-03 17:19:08
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2019-04-02 05:18:41
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2019-03-28 00:19:03
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2019-03-21 21:19:18
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2019-03-05 21:19:19
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2019-02-05 17:19:27
  • Multiple Updates
2019-01-30 21:18:44
  • Multiple Updates
2019-01-30 17:19:17
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2019-01-10 17:19:03
  • Multiple Updates
2018-12-04 17:19:50
  • Multiple Updates
2018-11-30 17:19:02
  • Multiple Updates
2018-11-01 13:20:57
  • Multiple Updates
2018-10-31 00:21:20
  • First insertion