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CVE-2018-11237

Published: 18 May 2018

An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27 and earlier may write data beyond the target buffer, leading to a buffer overflow in __mempcpy_avx512_no_vzeroupper.

Notes

AuthorNote
sbeattie
looks to have been introduced in 2.23

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
eglibc
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Not vulnerable

upstream Needs triage

xenial Does not exist

glibc
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic
Released (2.27-3ubuntu1.2)
cosmic Not vulnerable
(2.28-0ubuntu1)
disco Not vulnerable
(2.28-0ubuntu1)
eoan Not vulnerable
(2.28-0ubuntu1)
focal Not vulnerable
(2.28-0ubuntu1)
trusty Does not exist

upstream
Released (2.28)
xenial
Released (2.23-0ubuntu11.2)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9aaaab7c6e4176e61c59b0a63c6ba906d875dc0e (master)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ed983107bbc62245b06b99f02e69acf36a0baa3e (master)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0cf8a53e5f2ce7f71787537cf206228727afe256 (2.27)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f51c8367685dc888a02f7304c729ed5277904aff (2.27)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=58ad5f8a646338b2ee3f2136336dcf731e97ab4d (2.26)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6b4362f2cbb6ef6e265d9f216f3c13d84405a1c0 (2.26)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b501c7b09eb941dc7ff21f9939c322d2c9c32ec0 (2.24)

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H