Arbitrary Code Injection

Affecting ruby2.3 package, versions <2.3.3-1+deb9u7

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Overview

Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows HTTP Response Splitting. If a program using WEBrick inserts untrusted input into the response header, an attacker can exploit it to insert a newline character to split a header, and inject malicious content to deceive clients. NOTE: this issue exists because of an incomplete fix for CVE-2017-17742, which addressed the CRLF vector, but did not address an isolated CR or an isolated LF.

References

CVSS Score

5.3
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    Low
  • Availability
    None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVE
CVE-2019-16254
CWE
CWE-74
Snyk ID
SNYK-DEBIAN9-RUBY23-534910
Disclosed
26 Nov, 2019
Published
13 Nov, 2019