Is CVE-2017-7656 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 6%.

What products does CVE-2017-7656 affect?

Tracked products affected include Eclipse Jetty. Check the version you run to see whether it is affected.

How do I fix CVE-2017-7656?

Apply the vendor fix promptly. Upgrade affected products to a fixed version.

CVE-2017-7656

Q: What is CVE-2017-7656?

CVE-2017-7656 is a high-severity software vulnerability (CWE-444) with a CVSS score of 7.5. In Eclipse Jetty, versions 9.2.x and older, 9.3.x (all configurations), and 9.4.x (non-default configuration with RFC2616 compliance enabled), HTTP/0.9 is handled poorly. An HTTP/1 style request line (i.e. method space URI space version) th

HIGH severity · CVSS 7.5 · CWE-444

7.5CVSS HIGH

Summary

In Eclipse Jetty, versions 9.2.x and older, 9.3.x (all configurations), and 9.4.x (non-default configuration with RFC2616 compliance enabled), HTTP/0.9 is handled poorly. An HTTP/1 style request line (i.e. method space URI space version) that declares a version of HTTP/0.9 was accepted and treated as a 0.9 request. If deployed behind an intermediary that also accepted and passed through the 0.9 version (but did not act on it), then the response sent could be interpreted by the intermediary as HTTP/1 headers. This could be used to poison the cache if the server allowed the origin client to generate arbitrary content in the response.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactNone

Integrity impactHigh

Availability impactNone

Exploit probability (EPSS)6%

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

Affected products we track (1)

Eclipse Jetty

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

CVE-2017-7656

Summary

Impact & exploitability

Affected products we track (1)

Recommendation

Additional information