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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.39% probability · 71th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-331
- Affected
- embedthis/goahead
- Source
- cve@mitre.org
References
- https://devel.rtems.org/browser/rtems/cpukit/httpd/websda.c?rev=c1427d2758079f0e9dd6a8de1662d78e0d6bc4caMailing List, Third Party Advisory
- https://github.com/trenta3/goahead-versions/blob/master/2.1.8/230165webs218.tar.gz?raw=trueProduct, Third Party Advisory
- https://devel.rtems.org/browser/rtems/cpukit/httpd/websda.c?rev=c1427d2758079f0e9dd6a8de1662d78e0d6bc4caMailing List, Third Party Advisory
- https://github.com/trenta3/goahead-versions/blob/master/2.1.8/230165webs218.tar.gz?raw=trueProduct, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.