CVE-2021-20254
Description
A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
Related CPE's
References
CvssV3 impact
BaseSeverity | MEDIUM |
ConfidentialityImpact | HIGH |
AttackComplexity | HIGH |
Scope | UNCHANGED |
AttackVector | NETWORK |
AvailabilityImpact | NONE |
IntegrityImpact | HIGH |
PrivilegesRequired | LOW |
BaseScore | 6.8 |
VectorString | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |
Version | 3.1 |
UserInteraction | NONE |
CvssV2 impact
AccessComplexity | MEDIUM |
ConfidentialityImpact | PARTIAL |
AvailabilityImpact | NONE |
IntegrityImpact | PARTIAL |
BaseScore | 4.900000095367432 |
VectorString | AV:N/AC:M/Au:S/C:P/I:P/A:N |
Version | 2.0 |
AccessVector | NETWORK |
Authentication | SINGLE |