Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The UAF issue in ksmbdtcpnewconnection has been fixed. The race that occurs is between the process of handling a new TCP connection and its disconnection. This causes a UAF error in the struct tcptransport structure within...

Astra Linux – Vulnerability in Samba

A flaw was identified in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. If Samba’s AD DC did not strictly require a Kerberos PAC and always used the SIDs contained within it, it could become confused about the user represented by a ticket...

Astra Linux – Vulnerability in Samba

A flaw was discovered in the way samba handled file and directory permissions. A authenticated user could exploit this flaw to gain access to certain file and directory information that would otherwise be unavailable to the attacker...

Astra Linux – Vulnerability in Heimdal

All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11, and 4.11.x before 4.11.3 have a issue where the S4U MS-SFU Kerberos delegation model includes a feature that allows a subset of clients to be opt-out from constrained delegation in either S4U2Self or regular Kerberos authentication...

Astra Linux – Vulnerability in Samba

The fixes in 4.6.16, 4.7.9, 4.8.4, and 4.9.7 for CVE-2018-10919, which address the issue of confidential attributes being disclosed via LDAP filters, were insufficient. An attacker may be able to obtain confidential BitLocker recovery keys from a Samba AD DC...

Astra Linux – Vulnerability in Samba, Heimdal

A null pointer de-reference was detected in the way the Samba Kerberos server handled the absence of the sname in the TGS-REQ Ticket Granting Server – Request. A authenticated user could exploit this flaw to crash the Samba server...

Astra Linux – Vulnerability in Samba

Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability...

Astra Linux – Vulnerability in Heimdal, Samba

A heap-based buffer overflow vulnerability was discovered in Samba, specifically within the GSSAPI unwrapdes and unwrapdes3 routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow for a length-limited write buffer overflow on memory allocated by malloc,...

Astra Linux – Vulnerability in Samba

A flaw was discovered in the way Samba maps domain users to local users. An authenticated attacker could exploit this flaw to cause potential privilege escalation...

Astra Linux – Vulnerability in Samba

Kerberos acceptors need easy access to stable AD identifiers e.g., objectSid. Samba, as an AD DC, now provides a way for Linux applications to obtain a reliable SID and samAccountName from the issued tickets...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The reference count leak in smbcheckpermdacl has been fixed. The issue occurs in a specific part of smbcheckpermdacl. When “id” and “uid” have the same value, the function simply jumps out of the loop without decrementing...

Astra Linux – Vulnerability in Samba

A design flaw was identified in Samba’s DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers RODCs. This flaw allows RODCs and users with the GETCHANGES permission to access all attributes, including sensitive...

Astra Linux – Vulnerability in Samba

All versions of Samba prior to 4.13.16 are vulnerable to a malicious client that can exploit the race condition of SMB1 or NFS to create a directory in an area of the server file system that is not exported under the share definition. Note that SMB1 must be enabled, or the share must also be...

Astra Linux – Vulnerability in Heimdal, Samba

Before version 7.7.1, Heimdal allowed remote attackers to execute arbitrary code due to an invalid free operation in the ASN.1 codec used by the Key Distribution Center KDC...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: A possible reference count leak in smb2open has been fixed. The reference count of ACLs will cause a leak when memory allocation fails. This issue has been addressed by adding the missing posixaclrelease function...

Astra Linux – Vulnerability in cifs-utils

It was discovered that cifs-utils’ mount.cifs function invoked a shell when requesting the Samba password, which could be exploited to inject arbitrary commands. An attacker who had special permissions, such as those through sudo rules, could use this vulnerability to escalate their privileges...

Astra Linux – Vulnerability in Samba

In Samba, GnuTLS’ gnutlsrnd function may fail, resulting in predictable random values...

Astra Linux – Vulnerability in Samba

A null pointer dereference flaw was detected in Samba’s Winbind service in versions prior to 4.11.15, before 4.12.9, and before 4.13.1. A local user could exploit this flaw to crash the Winbind service, resulting in a denial of service...

Astra Linux – Vulnerability in Samba

A vulnerability was discovered in Samba’s “rpcecho” development server, a non-Windows RPC server used to test Samba’s DCE/RPC stack components. This vulnerability stems from an RPC function that can be blocked indefinitely. The issue arises because the “rpcecho” service operates with only one...

Astra Linux – Vulnerability in Samba

A out-of-bounds read vulnerability was discovered in Samba due to insufficient length checks in the winbinddpamauthcrap.c file. When performing NTLM authentication, the client sends cryptographic challenges back to the server. These responses have varying lengths, and Winbind fails to check the...