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CVE-2021-20277

High priority
Fixed

A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from...

2 affected packages

ldb, samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ldb Fixed Fixed
samba Not affected Not affected
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CVE-2021-20254

Medium priority
Fixed

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...

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Fixed Fixed
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CVE-2021-20251

Low priority

Some fixes available 1 of 6

A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Not affected Vulnerable Vulnerable Vulnerable
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CVE-2020-27840

High priority
Fixed

A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The...

2 affected packages

ldb, samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ldb Fixed Fixed
samba Not affected Not affected
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CVE-2020-25722

Medium priority

Some fixes available 11 of 13

Multiple flaws were found in the way samba AD DC implemented access and conformance checking of stored data. An attacker could use this flaw to cause total domain compromise.

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Fixed Fixed Fixed Fixed
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CVE-2020-25721

Medium priority

Some fixes available 6 of 9

Kerberos acceptors need easy access to stable AD identifiers (eg objectSid). Samba as an AD DC now provides a way for Linux applications to obtain a reliable SID (and samAccountName) in issued tickets.

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Fixed Fixed Ignored
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CVE-2020-25720

Medium priority
Vulnerable

A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after...

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Not affected Vulnerable Vulnerable Vulnerable
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CVE-2020-25719

Medium priority

Some fixes available 6 of 9

A flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. The Samba AD DC, could become confused about the user a ticket represents if it did not strictly require...

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Fixed Fixed Ignored
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CVE-2020-25718

Medium priority

Some fixes available 6 of 9

A flaw was found in the way samba, as an Active Directory Domain Controller, is able to support an RODC (read-only domain controller). This would allow an RODC to print administrator tickets.

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Fixed Fixed Ignored
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CVE-2020-25717

Medium priority

Some fixes available 11 of 13

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.

1 affected package

samba

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
samba Fixed Fixed Fixed Fixed
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