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CVE-2020-6096

Published: 1 April 2020

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

Priority

Low

CVSS 3 base score: 8.1

Status

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

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Ignored
(end of ESM support, was needed)
trusty Needed

upstream Needs triage

xenial Does not exist

glibc
Launchpad, Ubuntu, Debian
bionic
Released (2.27-3ubuntu1.5)
eoan Ignored
(reached end-of-life)
focal
Released (2.31-0ubuntu9.7)
groovy
Released (2.32-0ubuntu3)
hirsute
Released (2.32-0ubuntu3)
impish
Released (2.32-0ubuntu3)
jammy
Released (2.32-0ubuntu3)
precise Does not exist

trusty Does not exist

upstream Pending
(2.32)
xenial
Released (2.23-0ubuntu11.3)