high
7.5
CWE
400 770 20
Advisory Published
Advisory Published
CVE Published
Updated

CVE-2023-27530: Input Validation

First published: Wed Mar 08 2023(Updated: )

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.

Credit: support@hackerone.com support@hackerone.com support@hackerone.com

Affected SoftwareAffected VersionHow to fix
redhat/pcs<0:0.10.15-4.el8_8.1
0:0.10.15-4.el8_8.1
redhat/pcs<0:0.10.8-1.el8_4.4
0:0.10.8-1.el8_4.4
redhat/pcs<0:0.10.12-6.el8_6.4
0:0.10.12-6.el8_6.4
redhat/pcs<0:0.11.4-7.el9_2
0:0.11.4-7.el9_2
redhat/pcs<0:0.11.1-10.el9_0.4
0:0.11.1-10.el9_0.4
Rack Project Rack<2.0.9.3
Rack Project Rack>=2.1.0<2.1.4.3
Rack Project Rack>=2.2.0<2.2.6.3
Rack Project Rack>=3.0.0<3.0.4.2
Debian Debian Linux=10.0
Debian Debian Linux=11.0
rubygems/rack>=3.0.0<3.0.4.2
3.0.4.2
rubygems/rack>=2.2.0<2.2.6.3
2.2.6.3
rubygems/rack>=2.1.0<2.1.4.3
2.1.4.3
rubygems/rack<2.0.9.3
2.0.9.3
redhat/rubygem-rack<3.0.4.2
3.0.4.2
redhat/rubygem-rack<2.2.6.3
2.2.6.3
redhat/rubygem-rack<2.1.4.3
2.1.4.3
redhat/rubygem-rack<2.0.9.3
2.0.9.3
debian/ruby-rack
2.1.4-3+deb11u2
2.2.6.4-1+deb12u1
2.2.7-1.1

Remedy

https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388

Remedy

https://github.com/rack/rack/commit/8e8869d625e73e16b576b6d31b50208e9ec8002f

Remedy

https://github.com/rack/rack/commit/9aac3757fe19cdb0476504c9245170115bec9668

Remedy

https://github.com/rack/rack/commit/b632718265fa5ffa547b060331341a1e216b4ffa

Remedy

https://github.com/rack/rack/commit/5f6e2fcbbdbff2dfaa21baa693e9d23d12ac1459

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2023-27530.

  • What is the severity of CVE-2023-27530?

    The severity of CVE-2023-27530 is high.

  • What software is affected by CVE-2023-27530?

    The affected software is rubygem-rack versions <3.0.4.2, <2.2.6.3, <2.1.4.3, and <2.0.9.3.

  • How can I exploit CVE-2023-27530?

    Carefully crafted requests can abuse this vulnerability and cause multipart parsing to take longer than expected, resulting in a DoS (Denial of Service) attack.

  • Where can I find more information about CVE-2023-27530?

    You can find more information about CVE-2023-27530 at the following references: [Red Hat Security Advisory](https://access.redhat.com/security/cve/CVE-2023-27530), [Ruby Advisory Database](https://github.com/rubysec/ruby-advisory-db/tree/master/gems/rack/CVE-2023-27530.yml), [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=2176478).

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