CVE-2023-38546

Description

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](https://curl.se/libcurl/c/curl_easy_duphandle.html). 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.

Read the notes from the security team

Why is this CVE low priority?

Per upstream, this is a low-severity issue

Learn more about Ubuntu priority

• How can I get the fixes?
• What do statuses mean?
• Patch details

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Notes

Patch details

Severity score breakdown

CVSS version: CVSS v3.0

References

• MITRE
• NVD
• Launchpad
• Debian

Related Ubuntu Security Notices (USN)

• USN-6429-1
• curl vulnerabilities
• 11 October 2023
• USN-6429-2
• curl vulnerability
• 11 October 2023
• USN-6429-3
• curl vulnerabilities
• 17 October 2023

Other references

• https://curl.se/docs/CVE-2023-38546.html
• https://www.cve.org/CVERecord?id=CVE-2023-38546