CVE-2021-45105
Published: 19 December 2021
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
apache-log4j2 Launchpad, Ubuntu, Debian |
bionic |
Released
(2.12.4-0ubuntu0.1)
|
| focal |
Released
(2.17.0-0.20.04.1)
|
|
| hirsute |
Released
(2.17.0-0.21.04.1)
|
|
| impish |
Released
(2.17.0-0.21.10.1)
|
|
| jammy |
Not vulnerable
(2.17.0-1)
|
|
| kinetic |
Not vulnerable
(2.17.0-1)
|
|
| lunar |
Not vulnerable
(2.17.0-1)
|
|
| mantic |
Not vulnerable
(2.17.0-1)
|
|
| upstream |
Released
(2.17.0-1)
|
|
| xenial |
Needed
|
|
|
Patches: upstream: https://github.com/apache/logging-log4j2/commit/806023265f8c905b2dd1d81fd2458f64b2ea0b5e upstream: https://github.com/apache/logging-log4j2/commit/bf7e916df6335713fe2219c7b3b523fb509deabc |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |