Use After Free in Crowcpp Crow
CVE-2022-38667
HTTP applications (servers) based on Crow through 1.0+4 may allow a Use-After-Free and code execution when HTTP pipelining is used. The HTTP parser supports HTTP pipelining, but the asynchronous Connection layer is unaware of HTTP pipelining. Specifically, the Connection layer is unaware that it has begun processing a later request before it has finished processing an earlier request.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.029 (86.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000
Affected products
Weakness classification (CWE)
References
- cwe.mitre.org/data/definitions/372.html (Technical Description, Third Party Advisory)
- github.com/CrowCpp/Crow/pull/524 (Patch, Third Party Advisory)
- github.com/0xhebi/CVEs/blob/main/Crow/CVE-2022-38667.md (Exploit, Third Party Advisory)
- gynvael.coldwind.pl/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-38667?
- CVE-2022-38667 is a critical-severity vulnerability in Crowcpp Crow, classified under Use After Free. CVSS score: 9.8/10. Published 2022-08-22.
- How severe is CVE-2022-38667?
- Critical severity. CVSS v3 base score is 9.8 out of 10.