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CVE-2019-6488

Published: 18 January 2019

The string component in the GNU C Library (aka glibc or libc6) through 2.28, when running on the x32 architecture, incorrectly attempts to use a 64-bit register for size_t in assembly codes, which can lead to a segmentation fault or possibly unspecified other impact, as demonstrated by a crash in __memmove_avx_unaligned_erms in sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S during a memcpy.

Notes

AuthorNote
mdeslaur
only affects x32
we will not be fixing this issue in Ubuntu stable releases,
marking as ignored

Priority

Negligible

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
eglibc
Launchpad, Ubuntu, Debian
upstream Needs triage

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Ignored

xenial Does not exist

glibc
Launchpad, Ubuntu, Debian
bionic Ignored

cosmic Ignored
(end of life)
disco Not vulnerable
(2.29-0ubuntu2)
eoan Not vulnerable
(2.29-0ubuntu2)
focal Not vulnerable
(2.29-0ubuntu2)
trusty Does not exist

upstream
Released (2.29)
xenial Ignored

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