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.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
메트릭
메트릭
점수
심각도
CVSS 벡터
출처
V2
6.8
AV:N/AC:M/Au:N/C:P/I:P/A:P
nvd@nist.gov
EPSS
EPSS는 취약점이 악용될 가능성을 예측하는 점수 모델입니다.
EPSS 점수
EPSS 모델은 0과 1(0~100%) 사이의 확률 점수를 생성합니다. 점수가 높을수록 취약점이 악용될 가능성이 높습니다.
날짜
EPSS V0
EPSS V1
EPSS V2 (> 2022-02-04)
EPSS V3 (> 2025-03-07)
EPSS V4 (> 2025-03-17)
2022-02-06
–
–
3.07%
–
–
2022-04-03
–
–
3.07%
–
–
2022-06-26
–
–
3.07%
–
–
2023-02-26
–
–
3.07%
–
–
2023-03-12
–
–
–
1.48%
–
2024-02-11
–
–
–
1.48%
–
2024-03-31
–
–
–
1.48%
–
2024-06-02
–
–
–
1.48%
–
2024-09-15
–
–
–
1.27%
–
2024-12-22
–
–
–
1.34%
–
2025-01-19
–
–
–
1.34%
–
2025-03-18
–
–
–
–
1.14%
2025-03-30
–
–
–
–
1.14%
2025-04-06
–
–
–
–
1.14%
2025-08-01
–
–
–
–
1.14%
2025-08-04
–
–
–
–
1.14%
2025-08-21
–
–
–
–
1.14%
2025-08-24
–
–
–
–
1.14%
2025-08-29
–
–
–
–
1.14%
2025-11-18
–
–
–
–
1.14%
2025-11-21
–
–
–
–
1.14%
2026-05-10
–
–
–
–
1.14%
EPSS 백분위수
백분위수는 EPSS 점수에 따라 CVE의 순위를 매기는 데 사용됩니다. 예를 들어 EPSS 점수 기준 95번째 백분위수의 CVE는 다른 CVE의 95%보다 악용될 가능성이 높습니다.