External Control of File Name or Path Affecting curl package, versions [7.9.1,8.4.0)
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Test your applications- Snyk ID SNYK-UNMANAGED-CURL-5932092
- published 5 Oct 2023
- disclosed 5 Oct 2023
- credit w0x42
Introduced: 5 Oct 2023
CVE-2023-38546 Open this link in a new tabHow to fix?
Upgrade curl to version 8.4.0 or higher.
Overview
curl is a command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP. libcurl offers a myriad of powerful features.
Affected versions of this package are vulnerable to External Control of File Name or Path via the curl_easy_duphandle function, allowing an attacker to insert cookies into a running program using this library.
When this function is used to duplicate an easy handle with cookies enabled, the cookie-enable state is also cloned. However, the actual cookies are not cloned, and if the source handle did not read any cookies from a specific file on disk, the cloned handle would store the file name as none. Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would inadvertently load cookies from a file named none.
Note:
This is only exploitable if a file named none exists and is readable in the current directory of the program using libcurl and in the correct file format.
Changelog:
2023-10-04: Initial publication
2023-10-11: Published updated information, including CWE, CVSS, official references and affected versions range.