CVE-2021-3520
Published: 30 April 2021
There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
lz4 Launchpad, Ubuntu, Debian |
impish |
Not vulnerable
(1.9.3-2)
|
| upstream |
Released
(1.9.3-2)
|
|
| xenial |
Released
(0.0~r131-2ubuntu2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| bionic |
Released
(0.0~r131-2ubuntu3.1)
|
|
| focal |
Released
(1.9.2-2ubuntu0.20.04.1)
|
|
| groovy |
Released
(1.9.2-2ubuntu0.20.10.1)
|
|
| trusty |
Released
(0.0~r114-2ubuntu1+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| jammy |
Not vulnerable
(1.9.3-2)
|
|
| hirsute |
Released
(1.9.3-1ubuntu0.1)
|
|
|
Patches: upstream: https://github.com/lz4/lz4/commit/8301a21773ef61656225e264f4f06ae14462bca7 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |