CVE-2021-22926

描述

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.

如何修補 CVE-2021-22926

要修補 CVE-2021-22926,請將受影響套件升級到下列已修補版本。

• —升級至 7.67.0-r5 或更新版本

CVE-2021-22926 正在被利用嗎?

中等 — EPSS 為 9.8%,可持續追蹤但非最高優先。

受影響套件(1)

• >= 7.33.0, < 7.67.0-r5

CVSS 分數

參考連結(1)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-22926