CVE-2021-22898

Publication date 26 May 2021

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

3.1 · Low

Score breakdown

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.

Status

Package Ubuntu Release Status
curl 23.04 lunar
Fixed 7.74.0-1.2ubuntu4
22.10 kinetic
Fixed 7.74.0-1.2ubuntu4
22.04 LTS jammy
Fixed 7.74.0-1.2ubuntu4
21.10 impish
Fixed 7.74.0-1.2ubuntu4
21.04 hirsute
Fixed 7.74.0-1ubuntu2.1
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 7.68.0-1ubuntu2.6
18.04 LTS bionic
Fixed 7.58.0-2ubuntu3.14
16.04 LTS xenial
14.04 LTS trusty

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
curl

Severity score breakdown

Parameter Value
Base score 3.1 · Low
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

References

Related Ubuntu Security Notices (USN)

Other references