CVE catalog
CVE-2009-0021
ntp - cryptographic weakness
- Severity
- Unknown
- Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 3.22% · Oct 25, 2026
NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ntp | 11 | 1:4.2.4p4+dfsg-8 | fixed |
| Debian | ntp | 4.0 | 1:4.2.2.p4+dfsg-2 | vulnerable |
| Debian | ntp | 4.0 | 1:4.2.2.p4+dfsg-2etch1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ntp | deb | 11 | 1:4.2.4p4+dfsg-8 | Not reported | DEBIAN-CVE-2009-0021 | Not reported |
| Debian | ntp | deb | 4.0 | 1:4.2.2.p4+dfsg-2etch1 | Not reported | DSA-1702-1 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: