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
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
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| 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)
|
|
| kinetic |
Released
(2.32-0ubuntu3)
|
|
| lunar |
Released
(2.32-0ubuntu3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Pending
(2.32)
|
|
| xenial |
Released
(2.23-0ubuntu11.3)
|
|
|
Patches: upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=eec0f4218cda936a6ab8f543e90b96b196df3fc2 (test) upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=eca1b233322914d9013f3ee4aabecaadc9245abd (test) upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=79a4fa341b8a89cb03f84564fd72abaa1a2db394 upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=beea361050728138b82c57dda0c4810402d342b9 upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=7b5f02dc2a9278cd068a58a3db3644e24707be49 (test) |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.1 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |