#mac

**According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?** The word **Remote** in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. This means an attacker or victim needs to execute code from the local machine to exploit the vulnerability.

**According to the CVSS metric, user interaction is required (UI:R) and privileges required is Low (PR:L). What does that mean for this vulnerability?** An authorized attacker with standard user privileges could place a malicious file on the machine running Visual Studio Code and then wait for the privileged victim to use certain JavaScript debugger functionality.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** The attacker must inject themselves into the logical network path between the target and the resource requested by the victim to read or modify network communications. This is called a machine-in-the-middle (MITM) attack.

### Summary This vulnerability allows a user to bypass any predefined hardcoded URL path or security anti-Localhost mechanism and perform an arbitrary GET request to any Host, Port and URL using a Webfinger Request. ### Details The Webfinger endpoint takes a remote domain for checking accounts as a feature, however, as per the ActivityPub spec (https://www.w3.org/TR/activitypub/#security-considerations), on the security considerations section at B.3, access to Localhost services should be prevented while running in production. The library attempts to prevent Localhost access using the following mechanism (/src/config.rs): ```rust pub(crate) async fn verify_url_valid(&self, url: &Url) -> Result<(), Error> { match url.scheme() { "https" => {} "http" => { if !self.allow_http_urls { return Err(Error::UrlVerificationError( "Http urls are only allowed in debug mode", )); ...

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