Vulnerability Description
In Puma (RubyGem) before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.
CVSS Score
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Puma | Puma | >= 3.0.0, < 3.12.6 |
| Fedoraproject | Fedora | 33 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00034.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00038.htmlMailing ListThird Party Advisory
- https://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05Release Notes
- https://github.com/puma/puma/commit/f24d5521295a2152c286abb0a45a1e1e2bd275bdPatch
- https://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5hThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00009.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00034.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00038.htmlMailing ListThird Party Advisory
- https://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05Release Notes
- https://github.com/puma/puma/commit/f24d5521295a2152c286abb0a45a1e1e2bd275bdPatch
- https://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5hThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00009.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2020-11076?
CVE-2020-11076 is a vulnerability with a CVSS score of 7.5 (HIGH). In Puma (RubyGem) before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.
How severe is CVE-2020-11076?
CVE-2020-11076 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-11076?
Check the references section above for vendor advisories and patch information. Affected products include: Puma Puma, Fedoraproject Fedora, Debian Debian Linux.