CVE-2021-22945
Published: 15 September 2021
When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.
Notes
| Author | Note |
|---|---|
| alexmurray | MQTT sending support is only present in curl >= 7.70 - see Message-ID: <nycvar.QRO.7.76.2109061032590.1742@fvyyl> |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
curl Launchpad, Ubuntu, Debian |
impish |
Released
(7.74.0-1.3ubuntu2)
|
| jammy |
Released
(7.74.0-1.3ubuntu2)
|
|
| trusty |
Not vulnerable
(7.35.0-1ubuntu2.20+esm7)
|
|
| xenial |
Not vulnerable
(7.47.0-1ubuntu2.19)
|
|
| bionic |
Not vulnerable
(7.58.0-2ubuntu3.14)
|
|
| focal |
Not vulnerable
(7.68.0-1ubuntu2.6)
|
|
| hirsute |
Released
(7.74.0-1ubuntu2.3)
|
|
| upstream |
Released
(7.79.0)
|
|
|
Patches: upstream: https://github.com/curl/curl/commit/43157490a5054bd |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.1 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |