CVE-2022-22707
Published: 6 January 2022
In lighttpd 1.4.46 through 1.4.63, the mod_extforward_Forwarded function of the mod_extforward plugin has a stack-based buffer overflow (4 bytes representing -1), as demonstrated by remote denial of service (daemon crash) in a non-default configuration. The non-default configuration requires handling of the Forwarded header in a somewhat unusual manner. Also, a 32-bit system is much more likely to be affected than a 64-bit system.
Notes
| Author | Note |
|---|---|
| ebarretto | According to upstream the impact is limited to 32-bit lighttpd and to specific lighttpd mod_extforward configurations expected to be rare. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
lighttpd Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Released
(1.4.55-1ubuntu1.20.04.2)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Released
(1.4.63-1ubuntu3.1)
|
|
| kinetic |
Not vulnerable
(1.4.64-1)
|
|
| lunar |
Not vulnerable
(1.4.64-1)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
Patches: upstream: https://github.com/lighttpd/lighttpd1.4/commit/8c62a890e23f5853b1a562b03fe3e1bccc6e7664 |
||
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 |