CVE-2021-22898
Published: 26 May 2021
curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
curl Launchpad, Ubuntu, Debian |
bionic |
Released
(7.58.0-2ubuntu3.14)
|
| focal |
Released
(7.68.0-1ubuntu2.6)
|
|
| hirsute |
Released
(7.74.0-1ubuntu2.1)
|
|
| jammy |
Released
(7.74.0-1.2ubuntu4)
|
|
| kinetic |
Released
(7.74.0-1.2ubuntu4)
|
|
| lunar |
Released
(7.74.0-1.2ubuntu4)
|
|
| trusty |
Released
(7.35.0-1ubuntu2.20+esm14)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(7.77.0)
|
|
| xenial |
Released
(7.47.0-1ubuntu2.19+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| impish |
Released
(7.74.0-1.2ubuntu4)
|
|
| groovy |
Ignored
(end of life)
|
|
|
Patches: upstream: https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 3.1 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N |