CVE-2021-22898

Publication date 26 May 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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

Show unmaintained releases

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
	20.04 LTS focal	Fixed 7.68.0-1ubuntu2.6
	18.04 LTS bionic	Fixed 7.58.0-2ubuntu3.14
	16.04 LTS xenial	Fixed 7.47.0-1ubuntu2.19+esm3 Ubuntu Pro
	14.04 LTS trusty	Fixed 7.35.0-1ubuntu2.20+esm14 Ubuntu Pro

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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	Upstream: 39ce47f

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)

USN-5021-1
curl vulnerabilities
22 July 2021

USN-5021-2
curl vulnerability
20 January 2022

USN-5894-1
curl vulnerabilities
27 February 2023