CVE-2020-6096
Published: 01 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.
Low
CVSS 3 base score: 8.1
Status
| Package | Release | Status |
|---|---|---|
|
eglibc Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.04 (Hirsute Hippo) |
Does not exist
|
|
| Ubuntu 20.10 (Groovy Gorilla) |
Does not exist
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Needed
|
|
|
glibc Launchpad, Ubuntu, Debian |
Upstream |
Pending
(2.32)
|
| Ubuntu 21.04 (Hirsute Hippo) |
Released
(2.32-0ubuntu3)
|
|
| Ubuntu 20.10 (Groovy Gorilla) |
Released
(2.32-0ubuntu3)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Needed
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Needed
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Needed
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
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) |
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