CVE-2021-46854 json
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
published 3y ago modified 4mo ago also EUVD-2021-33508
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
Summary
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
Patch / fix
- proftpd proftpd 1.3.7c
- proftpd-dfsg Debian 14, Debian 13, Debian 12 1.3.7c+dfsg-1
debian advisories DEBIAN-CVE-2021-46854
- github.com/proftpd/proftpd#1285 pull request
Is CVE-2021-46854 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/proftpd/proftpd/issues/1284 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Classification
- Weakness
-
- CWE-401 Missing Release of Memory after Effective Lifetime
References
-
github.com
/proftpd/proftpd/pull/1285
third-party-advisory
-
github.com
/proftpd/proftpd/issues/1284
exploit, issue-tracking, third-party-advisory
-
security.gentoo.org
/glsa/202305-03
vendor-advisory
-
proftpd.org
/docs/RELEASE_NOTES-1.3.7e
release-notes, vendor-advisory
-
bugs.gentoo.org
/811495
issue-tracking, third-party-advisory
Sources
- CVE List CVE-2021-46854
- NVD CVE-2021-46854
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.