MaxQueryDuration not honoured in Samba AD DC LDAP

The remote host is affected by the vulnerability described in GLSA-202309-06 (Samba: Multiple Vulnerabilities)

  - Directory traversal vulnerability in the (1) extract and (2) extractall functions in the tarfile module in     Python allows user-assisted remote attackers to overwrite arbitrary files via a .. (dot dot) sequence in     filenames in a TAR archive, a related issue to CVE-2001-1267. (CVE-2007-4559)

  - 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)

  - Kerberos Security Feature Bypass Vulnerability (CVE-2020-17049)

  - 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 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. (CVE-2020-25718)

  - 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 a Kerberos PAC and always use the SIDs found within. The result could include total     domain compromise. (CVE-2020-25719)

  - 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.
    (CVE-2020-25721)

  - 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. (CVE-2020-25722)

  - MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

  - 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. (CVE-2021-3738)

  - 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. (CVE-2021-20251)

  - 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. (CVE-2021-20316)

  - A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large     DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data,     bypassing the signature requirements. (CVE-2021-23192)

  - All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to     determine if a file or directory exists in an area of the server file system not exported under the share     definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed.
    (CVE-2021-44141)

  - The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide ...enhanced compatibility     with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. Samba versions prior to     4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via     specially crafted extended file attributes. A remote attacker with write access to extended file     attributes can execute arbitrary code with the privileges of smbd, typically root. (CVE-2021-44142)

  - 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. (CVE-2022-0336)

  - In Samba, GnuTLS gnutls_rnd() can fail and give predictable random values. (CVE-2022-1615)

  - 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.
    (CVE-2022-2031)

  - A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and     unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI     library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a     maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the     application, possibly resulting in a denial of service (DoS) attack. (CVE-2022-3437)

  - A symlink following vulnerability was found in Samba, where a user can create a symbolic link that will     make 'smbd' escape the configured share path. This flaw allows a remote user with access to the exported     part of the file system under a share via SMB1 unix extensions or NFS to create symlinks to files outside     the 'smbd' configured share path and gain access to another restricted server's filesystem.
    (CVE-2022-3592)

  - 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). (CVE-2022-32742)

  - Samba does not validate the Validated-DNS-Host-Name right for the dNSHostName attribute which could permit     unprivileged users to write it. (CVE-2022-32743)

  - 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. (CVE-2022-32744)

  - A flaw was found in Samba. Samba AD users can cause the server to access uninitialized data with an LDAP     add or modify the request, usually resulting in a segmentation fault. (CVE-2022-32745)

  - 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. (CVE-2022-32746)

  - Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability (CVE-2022-37966)

  - Windows Kerberos Elevation of Privilege Vulnerability (CVE-2022-37967)

  - Netlogon RPC Elevation of Privilege Vulnerability (CVE-2022-38023)

  - PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that     may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit     platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other     platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has a similar bug.
    (CVE-2022-42898)

  - Since the Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability was disclosed by Microsoft on Nov     8 2022 and per RFC8429 it is assumed that rc4-hmac is weak, Vulnerable Samba Active Directory DCs will     issue rc4-hmac encrypted tickets despite the target server supporting better encryption (eg aes256-cts-     hmac-sha1-96). (CVE-2022-45141)

  - A flaw was found in Samba. An incomplete access check on dnsHostName allows authenticated but otherwise     unprivileged users to delete this attribute from any object in the directory. (CVE-2023-0225)

  - The fix in 4.6.16, 4.7.9, 4.8.4 and 4.9.7 for CVE-2018-10919 Confidential attribute disclosure vi LDAP     filters was insufficient and an attacker may be able to obtain confidential BitLocker recovery keys from a     Samba AD DC. (CVE-2023-0614)

  - The Samba AD DC administration tool, when operating against a remote LDAP server, will by default send new     or reset passwords over a signed-only connection. (CVE-2023-0922)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the samba packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

  - 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.
    (CVE-2022-2031)

  - 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). (CVE-2022-32742)

  - Samba does not validate the Validated-DNS-Host-Name right for the dNSHostName attribute which could permit     unprivileged users to write it. (CVE-2022-32743)

  - 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. (CVE-2022-32744)

  - A flaw was found in Samba. Samba AD users can cause the server to access uninitialized data with an LDAP     add or modify the request, usually resulting in a segmentation fault. (CVE-2022-32745)

  - 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. (CVE-2022-32746)

  - PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that     may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit     platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other     platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has 'a similar bug.'     (CVE-2022-42898)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

  - PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that     may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit     platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other     platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has 'a similar bug.'     (CVE-2022-42898)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - samba: MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5542-1 advisory.

  - samba: MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

  - The KDC and the kpasswd service share a single account and set of keys. In certain cases, this makes the     two services susceptible to confusion. When a user's password has expired, that user is requested to     change their password. Until doing so, the user is restricted to only acquiring tickets to kpasswd.
    However, a vulnerability meant that the kpasswd's principal, when canonicalized, was set to that of the     TGS (Ticket-Granting Service), thus yielding TGTs from ordinary kpasswd requests. These TGTs could be used     to perform an Elevation of Privilege attack by obtaining service tickets and using services in the forest.
    This vulnerability existed in versions of Samba built with Heimdal Kerberos. A separate vulnerability in     Samba versions below 4.16, and in Samba built with MIT Kerberos, led the KDC to accept kpasswd tickets as     if they were TGTs, with the same overall outcome. On the reverse side of the issue, password changes could     be effected by presenting TGTs as if they were kpasswd tickets. TGTs having potentially longer lifetimes     than kpasswd tickets, the value of a stolen cache containing a TGT was hence increased to an attacker,     with the possibility of indefinite control over an account by means of a password change. Finally, kpasswd     service tickets would be accepted for changes to one's own password, contrary to the requirement that     tickets be acquired with an initial KDC request in such cases. As part of the mitigations, the lifetime of     kpasswd tickets has been restricted to a maximum of two minutes. The KDC will not longer accept TGTs with     two minutes or less left to live, to make sure it does not accept kpasswd tickets. (CVE-2022-2031)

  - Please note that only versions of Samba prior to 4.11.0 are vulnerable to this bug by default. Samba     versions 4.11.0 and above disable SMB1 by default, and will only be vulnerable if the administrator has     deliberately enabled SMB1 in the smb.conf file. All versions of Samba with SMB1 enabled are vulnerable to     a server memory information leak bug over SMB1 if a client can write data to a share. 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 that is written to the file (or printer).
    (CVE-2022-32742)

  - Tickets received by the kpasswd service were decrypted without specifying that only that service's own     keys should be tried. By setting the ticket's server name to a principal associated with their own     account, or by exploiting a fallback where known keys would be tried until a suitable one was found, an     attacker could have the server accept tickets encrypted with any key, including their own. A user could     thus change the password of the Administrator account and gain total control over the domain. Full loss of     confidentiality and integrity would be possible, as well as of availability by denying users access to     their accounts. In addition, the kpasswd service would accept tickets encrypted by the krbtgt key of an     RODC, in spite of the fact that RODCs should not have been able to authorise password changes.
    (CVE-2022-32744)

  - Due to incorrect values used as the limit for a loop and as the 'count' parameter to memcpy(), the server,     receiving a specially crafted message, leaves an array of structures partially uninitialised, or accesses     an arbitrary element beyond the end of an array. Outcomes achievable by an attacker include segmentation     faults and corresponding loss of availability. Depending on the contents of the uninitialised memory,     confidentiality may also be affected. (CVE-2022-32745)

  - Some database modules make a shallow copy of an LDAP add/delete message so they can make modifications to     its elements without affecting the original message. Each element in a message points to an array of     values, and these arrays are shared between the original message and the copy. The issue arises when a     database module adds new values to an existing array. A call to realloc() increases the array's size to     accommodate new elements, but at the same time, frees the old array. This leaves the original message     element with a dangling pointer to a now-freed array. When the database audit logging module subsequently     logs the details of the original message, it will access this freed data, generally resulting in corrupted     log output or a crash. The code paths susceptible to this issue are reachable when certain specific     attributes, such as userAccountControl, are added or modified. These attributes are not editable by     default without having a privilege assigned, such as Write Property. (CVE-2022-32746)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2022:2307-1 advisory.

  - MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2022:1576-1 advisory.

  - MaxQueryDuration not honoured in Samba AD DC LDAP (CVE-2021-3670)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
181514	GLSA-202309-06 : Samba: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	critical
177176	EulerOS Virtualization 3.0.6.0 : samba (EulerOS-SA-2023-2231)	Nessus	Huawei Local Security Checks	high
171203	EulerOS 2.0 SP8 : samba (EulerOS-SA-2023-1336)	Nessus	Huawei Local Security Checks	high
169336	EulerOS Virtualization 2.10.0 : samba (EulerOS-SA-2022-2869)	Nessus	Huawei Local Security Checks	medium
169328	EulerOS Virtualization 2.10.1 : samba (EulerOS-SA-2022-2887)	Nessus	Huawei Local Security Checks	medium
165403	EulerOS Virtualization 2.9.0 : samba (EulerOS-SA-2022-2401)	Nessus	Huawei Local Security Checks	medium
165351	EulerOS Virtualization 2.9.1 : samba (EulerOS-SA-2022-2365)	Nessus	Huawei Local Security Checks	medium
164239	EulerOS 2.0 SP10 : samba (EulerOS-SA-2022-2249)	Nessus	Huawei Local Security Checks	medium
164164	EulerOS 2.0 SP10 : samba (EulerOS-SA-2022-2262)	Nessus	Huawei Local Security Checks	medium
163679	Ubuntu 20.04 LTS / 22.04 LTS : Samba vulnerabilities (USN-5542-1)	Nessus	Ubuntu Local Security Checks	high
162955	SUSE SLED15 / SLES15 Security Update : ldb, samba (SUSE-SU-2022:2307-1)	Nessus	SuSE Local Security Checks	medium
162899	EulerOS 2.0 SP9 : samba (EulerOS-SA-2022-1981)	Nessus	Huawei Local Security Checks	medium
162864	EulerOS 2.0 SP9 : samba (EulerOS-SA-2022-2011)	Nessus	Huawei Local Security Checks	medium
160886	SUSE SLED15 / SLES15 Security Update : ldb (SUSE-SU-2022:1576-1)	Nessus	SuSE Local Security Checks	medium

Detections

Analytics

CVE-2021-3670

medium

Tenable Plugins

critical

high

high

medium

medium

medium

medium

medium

medium

high

medium

medium

medium

medium