CVE-2021-23985
Description
If an attacker is able to alter specific about:config values (for example malware running on the user's computer), the Devtools remote debugging feature could have been enabled in a way that was unnoticable to the user. This would have allowed a remote attacker (able to make a direct network connection to the victim) to monitor the user's browsing activity and (plaintext) network traffic. This was addressed by providing a visual cue when Devtools has an open network socket. This vulnerability affects Firefox < 87.
References
CvssV3 impact
BaseSeverity | MEDIUM |
ConfidentialityImpact | HIGH |
AttackComplexity | LOW |
Scope | UNCHANGED |
AttackVector | NETWORK |
AvailabilityImpact | NONE |
IntegrityImpact | NONE |
PrivilegesRequired | NONE |
BaseScore | 6.5 |
VectorString | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Version | 3.1 |
UserInteraction | REQUIRED |
CvssV2 impact
AccessComplexity | MEDIUM |
ConfidentialityImpact | PARTIAL |
AvailabilityImpact | NONE |
IntegrityImpact | NONE |
BaseScore | 4.3 |
VectorString | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Version | 2.0 |
AccessVector | NETWORK |
Authentication | NONE |