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CVE-2019-16201

HIGHCVSS 7.5/10EPSS 5.09%

Last modified

CVE-2019-16201 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.. EPSS estimates a 5.09% chance of exploitation in the next 30 days.

Description

WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
5.09%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Ruby-LangRuby>= 2.4.0, <= 2.4.7
Ruby-LangRuby>= 2.5.0, <= 2.5.6
Ruby-LangRuby>= 2.6.0, <= 2.6.4
DebianDebian Linux8.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-16201?
WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.
How severe is CVE-2019-16201?
CVE-2019-16201 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.09% probability of exploitation in the next 30 days.
How do I fix CVE-2019-16201?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST