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WS-2020-0060

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Date: March 31, 2020

Versions of jsrsasign are vulnerable to Timing Attacks. The signHex function uses a timing-unsafe method for ECDSA key generation and signing. This leaks the length of the scalar, which attackers may use to brute-force the private key. Timing attacks can be used to increase the efficiency of brute-force attacks by removing the exponential increase in entropy gained from longer secrets. This issue only affects the ECDSA functions.

Language: Java

Severity Score

Severity Score

Weakness Type (CWE)

Observable Timing Discrepancy

CWE-208

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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