CVE-2012-6109

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-03-01 · updated 2026-06-16

Description

lib/rack/multipart.rb in Rack before 1.1.4, 1.2.x before 1.2.6, 1.3.x before 1.3.7, and 1.4.x before 1.4.2 uses an incorrect regular expression, which allows remote attackers to cause a denial of service (infinite loop) via a crafted Content-Disposion header.

Affected products

Rack Project Rack: through 1.1.3; 0.1, 0.2, 0.3, 0.4, 0.9, 0.9.1 (+18)

References

http://rack.github.com/
http://rhn.redhat.com/errata/RHSA-2013-0544.html
http://rhn.redhat.com/errata/RHSA-2013-0548.html
https://bugzilla.redhat.com/show_bug.cgi?id=895277
https://github.com/rack/rack/blob/master/README.rdoc
https://github.com/rack/rack/commit/c9f65df37a151821eb88ddd1dc404b83e52c52d5
https://groups.google.com/forum/#%21msg/rack-devel/1w4_fWEgTdI/XAkSNHjtdTsJ
http://rack.github.com/
http://rhn.redhat.com/errata/RHSA-2013-0544.html
http://rhn.redhat.com/errata/RHSA-2013-0548.html
https://bugzilla.redhat.com/show_bug.cgi?id=895277
https://github.com/rack/rack/blob/master/README.rdoc

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