CVE-2009-0021 describes a vulnerability in NTP versions 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150. It allows remote attackers to bypass certificate chain validation by exploiting improper handling of the OpenSSL EVP_VerifyFinal function's return value, specifically with malformed SSL/TLS signatures for DSA and ECDSA keys. This vulnerability has a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity, requiring no authentication, and potentially leading to partial confidentiality impact. There is no known impact on integrity or availability. Currently, there is no evidence of active exploitation, public exploit code (e.g., Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.2.4p4CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* | ||
4.2.0CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.2.0:*:*:*:*:*:*:* | ||
4.2.2CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.2.2:*:*:*:*:*:*:* | ||
4.2.4p1CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.2.4p1:*:*:*:*:*:*:* | ||
4.2.4p2CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.2.4p2:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:P/I:N/A:N
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.