CVE-2022-27779

Description

libcurl wrongly allows cookies to be set for Top Level Domains (TLDs) if thehost name is provided with a trailing dot.curl can be told to receive and send cookies. curl's "cookie engine" can bebuilt with or without [Public Suffix List](https://publicsuffix.org/)awareness. If PSL support not provided, a more rudimentary check exists to atleast prevent cookies from being set on TLDs. This check was broken if thehost name in the URL uses a trailing dot.This can allow arbitrary sites to set cookies that then would get sent to adifferent and unrelated site or domain.

How to fix CVE-2022-27779

To remediate CVE-2022-27779, upgrade the affected package to a fixed version below.

• —upgrade to 7.83.1-r0 or later
• —upgrade to 7.83.1-1 or later

Is CVE-2022-27779 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 7.83.1-r0
• from 0, < 7.83.1-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-27779
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-27779