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CVE-2017-2666

MEDIUMCVSS 6.5/10EPSS 2.71%

Last modified

CVE-2017-2666 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. EPSS estimates a 2.71% chance of exploitation in the next 30 days.

Description

It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

Metrics

CVSS 3.0
6.5/10

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability
2.71%

84.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
RedhatUndertowAll versions
RedhatJboss Enterprise Application Platform7.0.0
RedhatJboss Enterprise Application Platform7.1.0
DebianDebian Linux9.0
DebianDebian Linux10.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-2666?
It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.
How severe is CVE-2017-2666?
CVE-2017-2666 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.71% probability of exploitation in the next 30 days.
How do I fix CVE-2017-2666?
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.

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Source: NVD / NIST