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WS-2021-0151
Good to know:
Date: June 8, 2021
In “Bitwarden/web”, v1.6.0 to v1.9.1 do not properly implement a defense against timing attacks on mac verification. This allows a remote attacker to guess the correct bytes of the tag by looping over all possible first bytes and stop when verification takes a little longer, by repeating this process for all tag bytes an attacker will obtain a valid tag.
Language: TYPE_SCRIPT
Severity Score
Severity Score
Weakness Type (CWE)
Observable Discrepancy
CWE-203Top Fix
CVSS v3
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| Attack Vector (AV): | |
| Attack Complexity (AC): | |
| Privileges Required (PR): | |
| User Interaction (UI): | |
| Scope (S): | |
| Confidentiality (C): | PARTIAL |
| Integrity (I): | PARTIAL |
| Availability (A): | PARTIAL |