Possible Denial of Service Vulnerability in Rack's header parsing
There is a denial of service vulnerability in the header parsing component of Rack. This vulnerability has been assigned the CVE identifier CVE-2023-27539. Versions Affected: >= 2.0.0 Not affected: None. Fixed Versions: 2.2.6.4, 3.0.6.1 # Impact Carefully crafted input can cause header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. Any applications that parse headers using Rack (virtually all Rails applications) are impacted. # Workarounds Setting Regexp.timeout in Ruby 3.2 is a possible workaround.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-27539US | medium5.3 | — | ||
There is a denial of service vulnerability in the header parsing component of Rack. | ||||
references
External citations — patches, advisories, analysis.
- https://discuss.rubyonrails.org/t/cve-2023-27539-possible-denial-of-service-vulnerability-in-racks-header-parsing/82466WEB
- https://github.com/rack/rackPACKAGE
- https://github.com/rack/rack/commit/231ef369ad0b542575fb36c74fcfcfabcf6c530cWEB
- https://github.com/rack/rack/commit/ee7919ea04303717858be1c3f16b406adc6d8cffWEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2023-27539.ymlWEB
- https://lists.debian.org/debian-lts-announce/2023/04/msg00017.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-27539ADVISORY
- https://security.netapp.com/advisory/ntap-20231208-0016WEB
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