CVE-2020-11076

Advisory lineage Upstream: 0 Downstream: 25
Modified
Published: 22 May 2020, 14:50
Last modified:04 Aug 2024, 11:21

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
1.78% LOW
2% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 May 2020, 14:50
Published
Vulnerability first disclosed
04 Aug 2024, 11:21
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 1.78%• Percentile: 83%

Techniques & Countermeasures

  • CWE-444•Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

    The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

Affected Systems

  • debian•debian_linux

    9.0

  • fedoraproject•fedora

    33

  • puma•puma

    ≥ 3.0.0, < 3.12.6 | ≥ 4.0.0, < 4.3.5 | < 3.12.5 | ≥ 4.0.0, < 4.3.4

References (7)