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Vulnerability · Published Mar 10, 2023 · Assigned by hackerone

CVE-2023-27530

High 7.5

In plain English

A high-severity uncontrolled resource consumption in https://github.com/rack/rack. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.8%top 21.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A DoS vulnerability exists in Rack <v3.0.4.2, <v2.2.6.3, <v2.1.4.3 and <v2.0.9.3 within in the Multipart MIME parsing code in which could allow an attacker to craft requests that can be abuse to cause multipart parsing to take longer than expected.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8pcs0.10.15-4.el8_8.1.almaALSA-2023:3082
AlmaLinux:9pcs0.11.4-7.el9_2ALSA-2023:2652
AlmaLinux:8pcs-snmp0.10.15-4.el8_8.1.almaALSA-2023:3082
AlmaLinux:9pcs-snmp0.11.4-7.el9_2ALSA-2023:2652
Debian:12ruby-rack2.2.6.4-1DEBIAN-CVE-2023-27530
Debian:13ruby-rack2.2.6.4-1DEBIAN-CVE-2023-27530
Debian:14ruby-rack2.2.6.4-1DEBIAN-CVE-2023-27530
Rocky Linux:8pcs0:0.10.15-4.el8_8.1RLSA-2023:3082
Rocky Linux:9pcs0:0.11.4-7.el9_2RLSA-2023:2652
RubyGemsrack2.0.9.3GHSA-3h57-hmj3-gj3p
RubyGemsrack2.1.4.3GHSA-3h57-hmj3-gj3p
RubyGemsrack2.2.6.3GHSA-3h57-hmj3-gj3p
RubyGemsrack3.0.4.2GHSA-3h57-hmj3-gj3p
Ubuntu:22.04:LTSruby-rack2.1.4-5ubuntu1.1USN-7036-1
Ubuntu:22.04:LTSruby-rack2.1.4-5ubuntu1.1UBUNTU-CVE-2023-27530
Ubuntu:24.04:LTSruby-rack2.2.7-1ubuntu0.1USN-6837-1

Affected products (as reported)

VendorProductVersions
n/a https://github.com/rack/rack 3.0.4.2, 2.2.6.3, 2.1.4.3, 2.0.9.3

Weakness: CWE-400, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References