QID 353170

Date Published: 2022-02-21

QID 353170: Amazon Linux Security Advisory for samba : ALAS-2022-1564

A flaw was found in the way samba implemented smb1 authentication.
An attacker could use this flaw to retrieve the plaintext password sent over the wire even if kerberos authentication was required. (
( CVE-2016-2124) a flaw was found in the way samba maps domain users to local users.
An authenticated attacker could use this flaw to cause possible privilege escalation. (
( CVE-2020-25717) 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. (
( CVE-2021-20254) out-of-bounds heap read/write vulnerability in vfs module vfs_fruit allows code execution (cve-2021-44142)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Critical - 8.8 severity.
  • CVSS V2 rated as Critical - 9 severity.
    • Solution
    Please refer to Amazon advisory: ALAS-2022-1564 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 353170

    CVE-2021-44142 | CVE-2020-25717 | CVE-2021-20254 | CVE-2016-2124 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS-2022-1564 Amazon Linux URL Logo alas.aws.amazon.com/ALAS-2022-1564.html
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