Vulnerability in Embedthis Goahead
CVE-2021-41615
websda.c in GoAhead WebServer 2.1.8 has insufficient nonce entropy because the nonce calculation relies on the hardcoded onceuponatimeinparadise value, which does not follow the secret-data guideline for HTTP Digest Access Authentication in RFC 7616 section 3.3 (or RFC 2617 section 3.2.1). NOTE: 2.1.8 is a version from 2003; however, the affected websda.c code appears in multiple derivative works that may be used in 2021. Recent GoAhead software is unaffected.
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: 0.014 (71.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Embedthis Goahead — versions 2.1.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- devel.rtems.org/browser/rtems/cpukit/httpd/websda.c (Mailing List, Third Party Advisory)
- github.com/trenta3/goahead-versions/blob/master/2.1.8/230165webs218.tar.gz (Product, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-41615?
- CVE-2021-41615 is a critical-severity vulnerability in Embedthis Goahead, classified under Insufficient Entropy. CVSS score: 9.8/10. Published 2022-08-08.
- How severe is CVE-2021-41615?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-41615 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.