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CVE-2024-32477

Deno command injection

7.7 HIGHPublic exploitEPSS 0.34%
  1. Published18 Apr 2024

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults. By using ANSI escape sequences and a race between `libc::tcflush(0, libc::TCIFLUSH)` and reading standard input, it's possible to manipulate the permission prompt and force it to allow an unsafe action regardless of the user input. Some ANSI escape sequences act as a info request to the master terminal emulator and the terminal emulator sends back the reply in the PTY channel. standard streams also use this channel to send and get data. For example the `\033[6n` sequence requests the current cursor position. These sequences allow us to append data to the standard input of Deno. This vulnerability allows an attacker to bypass Deno permission policy. This vulnerability is fixed in 1.42.2.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Deno< 1.42.2

Remediation

Fixed in
Deno≥ 1.42.2

References

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Frequently asked

Is CVE-2024-32477 being actively exploited?

CVE-2024-32477 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.34%.

How severe is CVE-2024-32477?

CVE-2024-32477 has a CVSS 3.1 base score of 7.7, rated high. EPSS estimates a 0.34% probability of exploitation.

Which products are affected by CVE-2024-32477?

Affected products include Deno.

How do I fix CVE-2024-32477?

Upgrade affected software to a fixed version, for example Deno 1.42.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.