Vulnerability in Golang H2c
CVE-2022-41721
A request smuggling attack is possible when using MaxBytesHandler. When using MaxBytesHandler, the body of an HTTP request is not fully consumed. When the server attempts to read HTTP2 frames from the connection, it will instead be reading the body of the HTTP request, which could be attacker-manipulated to represent arbitrary HTTP2 requests.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.018 (77.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Golang H2c
- Golang.org/x/net Golang.org/x/net/http2/h2c — versions 0.0.0-20220524220425-1d687d428aca
Weakness classification (CWE)
References
- go.dev/issue/56352 (Exploit, Patch, Issue Tracking, Vendor Advisory)
- go.dev/cl/447396 (Patch, Vendor Advisory)
- pkg.go.dev/vuln/GO-2023-1495 (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
Frequently asked questions
- What is CVE-2022-41721?
- CVE-2022-41721 is a high-severity vulnerability in Golang H2c, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2023-01-13.
- How severe is CVE-2022-41721?
- High severity. CVSS v3 base score is 7.5 out of 10.