6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.015 Low
EPSS
Percentile
86.9%
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY
before 0.63 allows remote SSH servers to cause a denial of service (crash)
and possibly trigger memory corruption or code execution via a crafted DSA
signature, which is not properly handled when performing certain
bit-shifting operations during modular multiplication.