High severity · published Oct 6, 2020
CVE-2020-25613
An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1
7.5
CVSS
3.8%
EPSS
No
On KEV
Description
An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.8% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
32; 33 · source: NVD
RU
Ruby · Ruby-lang
through 2.5.8; 2.6.0 through 2.6.6; 2.7.0 through 2.7.1 · source: NVD
WE
Webrick · Ruby-lang
through 1.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25613
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-25613
Patch
https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7
Permissions Required
https://hackerone.com/reports/965267
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV/
security.gentoo.org
https://security.gentoo.org/glsa/202401-27
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