Samba: >> Samba >> 4.13.11 Security Vulnerabilities
In Samba, GnuTLS gnutls_rnd() can fail and give predictable random values.
CVSS Score
5.5
EPSS Score
0.001
Published
2022-09-01
The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure that SPNs do not alias with those already in the database. Some of these checks are able to be bypassed if an account modification re-adds an SPN that was previously present on that account, such as one added when a computer is joined to a domain. An attacker who has the ability to write to an account can exploit this to perform a denial-of-service attack by adding an SPN that matches an existing service. Additionally, an attacker who can intercept traffic can impersonate existing services, resulting in a loss of confidentiality and integrity.
CVSS Score
8.8
EPSS Score
0.002
Published
2022-08-29
A flaw was found in Samba. Some SMB1 write requests were not correctly range-checked to ensure the client had sent enough data to fulfill the write, allowing server memory contents to be written into the file (or printer) instead of client-supplied data. The client cannot control the area of the server memory written to the file (or printer).
CVSS Score
4.3
EPSS Score
0.002
Published
2022-08-25
A flaw was found in Samba. The KDC accepts kpasswd requests encrypted with any key known to it. By encrypting forged kpasswd requests with its own key, a user can change other users' passwords, enabling full domain takeover.
CVSS Score
8.8
EPSS Score
0.003
Published
2022-08-25
A flaw was found in the Samba AD LDAP server. The AD DC database audit logging module can access LDAP message values freed by a preceding database module, resulting in a use-after-free issue. This issue is only possible when modifying certain privileged attributes, such as userAccountControl.
CVSS Score
5.4
EPSS Score
0.002
Published
2022-08-25
A flaw was found in Samba. The security vulnerability occurs when KDC and the kpasswd service share a single account and set of keys, allowing them to decrypt each other's tickets. A user who has been requested to change their password, can exploit this flaw to obtain and use tickets to other services.
CVSS Score
8.8
EPSS Score
0.003
Published
2022-08-25
A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.
CVSS Score
6.8
EPSS Score
0.005
Published
2022-08-23
MaxQueryDuration not honoured in Samba AD DC LDAP
CVSS Score
6.5
EPSS Score
0.033
Published
2022-08-23
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.
CVSS Score
8.8
EPSS Score
0.002
Published
2022-03-16
In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'. These handles can reference connections to our sam.ldb database. However while the database was correctly shared, the user credentials state was only pointed at, and when one connection within that association group ended, the database would be left pointing at an invalid 'struct session_info'. The most likely outcome here is a crash, but it is possible that the use-after-free could instead allow different user state to be pointed at and this might allow more privileged access.
CVSS Score
8.8
EPSS Score
0.003
Published
2022-03-02