CVE-2021-29504

WP-CLI is the command-line interface for WordPress. An improper error handling in HTTPS requests management in WP-CLI version 0.12.0 and later allows remote attackers able to intercept the communication to remotely disable the certificate verification on WP-CLI side, gaining full control over the communication content, including the ability to impersonate update servers and push malicious updates towards WordPress instances controlled by the vulnerable WP-CLI agent, or push malicious updates toward WP-CLI itself. The vulnerability stems from the fact that the default behavior of `WP_CLIUtilshttp_request()` when encountering a TLS handshake error is to disable certificate validation and retry the same request. The default behavior has been changed with version 2.5.0 of WP-CLI and the `wp-cli/wp-cli` framework (via https://github.com/wp-cli/wp-cli/pull/5523) so that the `WP_CLIUtilshttp_request()` method accepts an `$insecure` option that is `false` by default and consequently that a TLS handshake failure is a hard error by default. This new default is a breaking change and ripples through to all consumers of `WP_CLIUtilshttp_request()`, including those in separate WP-CLI bundled or third-party packages. https://github.com/wp-cli/wp-cli/pull/5523 has also added an `--insecure` flag to the `cli update` command to counter this breaking change. There is no direct workaround for the default insecure behavior of `wp-cli/wp-cli` versions before 2.5.0. The workaround for dealing with the breaking change in the commands directly affected by the new secure default behavior is to add the `--insecure` flag to manually opt-in to the previous insecure behavior.

Link	Resource
https://github.com/wp-cli/config-command/pull/128	Patch Third Party Advisory
https://github.com/wp-cli/core-command/pull/186	Patch Third Party Advisory
https://github.com/wp-cli/wp-cli/pull/5523	Patch Third Party Advisory
https://github.com/wp-cli/package-command/pull/138	Third Party Advisory
https://github.com/wp-cli/extension-command/pull/287	Patch Third Party Advisory
https://github.com/wp-cli/checksum-command/pull/86	Patch Third Party Advisory
https://github.com/wp-cli/wp-cli/security/advisories/GHSA-rwgm-f83r-v3qj	Third Party Advisory

Configuration 1

cpe:2.3:a:wp-cli:wp-cli:*:*:*:*:*:*:*:*

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Published : 2021-06-07 09:15

Updated : 2021-06-17 03:33

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NVD link : CVE-2021-29504

Mitre link : CVE-2021-29504

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CWE-295

Improper Certificate Validation