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CVE-2021-22926

Status Candidate

Overview

libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the `CURLOPT_SSLCERT` option (`--cert` with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like `/tmp`), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.

Related Files

Gentoo Linux Security Advisory 202212-01
Posted Dec 19, 2022
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202212-1 - Multiple vulnerabilities have been found in curl, the worst of which could result in arbitrary code execution. Versions less than 7.86.0 are affected.

tags | advisory, arbitrary, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2021-22922, CVE-2021-22923, CVE-2021-22925, CVE-2021-22926, CVE-2021-22945, CVE-2021-22946, CVE-2021-22947, CVE-2022-22576, CVE-2022-27774, CVE-2022-27775, CVE-2022-27776, CVE-2022-27779, CVE-2022-27780, CVE-2022-27781
SHA-256 | e297fe6f1bca3eb09660ab5922cdfac1c9a3279734e9e89e74cc758a3e08ac46
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