Homepage
About Snyk

CVE-2023-38546 Affecting curl package, versions <7.64.0-4+deb10u7

0.0
low

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    EPSS 0.08% (34th percentile)
Expand this section
NVD
3.7 low
Expand this section
SUSE
4.5 medium
Expand this section
Red Hat
3.7 low

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-DEBIAN10-CURL-5955039
  • published 11 Oct 2023
  • disclosed 18 Oct 2023
Report a new vulnerability Found a mistake?

Introduced: 11 Oct 2023

CVE-2023-38546 Open this link in a new tab

How to fix?

Upgrade Debian:10 curl to version 7.64.0-4+deb10u7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met.

libcurl performs transfers. In its API, an application creates "easy handles" that are the individual handles for single transfers.

libcurl provides a function call that duplicates en easy handle called curl_easy_duphandle.

If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as none (using the four ASCII letters, no quotes).

Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named none - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.