Detections
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CVE-2023-38546
low
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.
From the Tenable Blog
CVE-2023-38545, CVE-2023-38546: Frequently Asked Questions for New Vulnerabilities in curl
Published: 2023-10-05
Frequently asked questions relating to two vulnerabilities patched in curl version 8.4.0
References
https://www.ic3.gov/Media/News/2024/241010.pdf
https://www.cisa.gov/news-events/ics-advisories/icsa-24-137-07
https://support.apple.com/kb/HT214063
https://support.apple.com/kb/HT214058
https://support.apple.com/kb/HT214057
https://support.apple.com/kb/HT214036
https://forum.vmssoftware.com/viewtopic.php?f=8&t=8868
https://curl.se/docs/CVE-2023-38546.html
http://seclists.org/fulldisclosure/2024/Jan/38