CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
AI Score
Confidence
Low
EPSS
Percentile
73.4%
The installer in Yahoo! Messenger 4.0, 5.0 and 5.5 does not verify package signatures which could allow remote attackers to install trojan programs via DNS spoofing.