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CVE-2021-22876

Published: 31 March 2021

curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unauthorized Actor" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.

Notes

AuthorNote
amurray
affects curl versions between 7.1.1 and 7.75.0
Priority

Medium

CVSS 3 base score: 5.3

Status

Package Release Status
curl
Launchpad, Ubuntu, Debian
bionic
Released (7.58.0-2ubuntu3.13)
focal
Released (7.68.0-1ubuntu2.5)
groovy
Released (7.68.0-1ubuntu4.3)
hirsute
Released (7.74.0-1ubuntu2)
precise Ignored
(end of ESM support, was needed)
trusty
Released (7.35.0-1ubuntu2.20+esm7)
upstream Needs triage

xenial
Released (7.47.0-1ubuntu2.19)
Patches:
vendor: https://curl.se/XOXep4o2CSG0.patch