CVE-2021-42374
Published: 15 November 2021
An out-of-bounds heap read in Busybox's unlzma applet leads to information leak and denial of service when crafted LZMA-compressed input is decompressed. This can be triggered by any applet/format that
Notes
| Author | Note |
|---|---|
| mdeslaur | introduced in 1.27.0 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
busybox Launchpad, Ubuntu, Debian |
bionic |
Released
(1:1.27.2-2ubuntu3.4)
|
| focal |
Released
(1:1.30.1-4ubuntu6.4)
|
|
| hirsute |
Released
(1:1.30.1-6ubuntu2.1)
|
|
| impish |
Released
(1:1.30.1-6ubuntu3.1)
|
|
| jammy |
Released
(1:1.30.1-7ubuntu2)
|
|
| trusty |
Not vulnerable
|
|
| upstream |
Released
(1.34.0)
|
|
| xenial |
Not vulnerable
|
|
|
Patches: upstream: https://git.busybox.net/busybox/commit/?id=04f052c56ded5ab6a904e3a264a73dc0412b2e78 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H |