CVE-2021-22925
Published: 21 July 2021
curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.
Notes
| Author | Note |
|---|---|
| mdeslaur | caused by incomplete fix for CVE-2021-22898 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
curl Launchpad, Ubuntu, Debian |
bionic |
Released
(7.58.0-2ubuntu3.14)
|
| focal |
Released
(7.68.0-1ubuntu2.6)
|
|
| groovy |
Ignored
(reached end-of-life)
|
|
| hirsute |
Released
(7.74.0-1ubuntu2.1)
|
|
| impish |
Released
(7.74.0-1.2ubuntu4)
|
|
| jammy |
Released
(7.74.0-1.2ubuntu4)
|
|
| kinetic |
Released
(7.74.0-1.2ubuntu4)
|
|
| trusty |
Released
(7.35.0-1ubuntu2.20+esm14)
|
|
| upstream |
Released
(7.78.0)
|
|
| xenial |
Released
(7.47.0-1ubuntu2.19+esm3)
|
|
|
Patches: upstream: https://github.com/curl/curl/commit/894f6ec730597eb243618d33cc84d71add8d6a8a |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |