CVE-2021-20254

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.

References

Affected packages

Git / github.com/samba-team/samba

Affected ranges

Type

GIT

Repo

https://github.com/samba-team/samba

Events

Introduced

b1d9ddf738c6e59e489bc9c339ce6de5988b689e

Fixed

703c6301013f78e80882abfe8375d6a45a176b7f

Introduced

3fe82c204f0d88cb6db50b7bd1f798b591a918f8

Fixed

058aaad5f4a2399dc0c11b42a6650c251957f24d

Introduced

9b49519cae3e967af9ea48dc5fcfb6c145e31db4

Fixed

e29fc62e1d60a1add177fca059d0d67dcf6a1866

Database specific

{
    "versions": [
        {
            "introduced": "3.6.0"
        },
        {
            "fixed": "4.12.15"
        },
        {
            "introduced": "4.13.0"
        },
        {
            "fixed": "4.13.8"
        },
        {
            "introduced": "4.14.0"
        },
        {
            "fixed": "4.14.4"
        }
    ]
}

Affected versions

ldb-2.*

ldb-2.2.1

ldb-2.3.0

samba-4.*

samba-4.13.0

samba-4.13.1

samba-4.13.2

samba-4.13.3

samba-4.13.4

samba-4.13.5

samba-4.13.6

samba-4.13.7

samba-4.14.0

samba-4.14.1

samba-4.14.2

samba-4.14.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20254.json"

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "32"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "33"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "7.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "8.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "9.0"
            }
        ]
    }
]