A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the processing of SMB2_LOGOFF and SMB2_CLOSE commands. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to execute code in the context of the kernel.

An update of the linux package has been released.

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6725-2 advisory.

    Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate     certain data structure fields when parsing lease contexts, leading to an out-of-bounds read vulnerability.
    A remote attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-1194)

    Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel,     leading to a use-after-free vulnerability. A remote attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2023-32254)

    It was discovered that a race condition existed in the KSMBD implementation in the Linux kernel when     handling session connections, leading to a use- after-free vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-32258)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes     in certain operations, leading to an integer underflow and out-of-bounds read vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-38427)

    Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate SMB     request protocol IDs, leading to a out-of- bounds read vulnerability. A remote attacker could possibly use     this to cause a denial of service (system crash). (CVE-2023-38430)

    Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate     packet header sizes in certain situations, leading to an out-of-bounds read vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-38431)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly handle session setup     requests, leading to an out-of-bounds read vulnerability. A remote attacker could use this to expose     sensitive information. (CVE-2023-3867)

    Pratyush Yadav discovered that the Xen network backend implementation in the Linux kernel did not properly     handle zero length data request, leading to a null pointer dereference vulnerability. An attacker in a     guest VM could possibly use this to cause a denial of service (host domain crash). (CVE-2023-46838)

    It was discovered that the IPv6 implementation of the Linux kernel did not properly manage route cache     memory usage. A remote attacker could use this to cause a denial of service (memory exhaustion).
    (CVE-2023-52340)

    It was discovered that the device mapper driver in the Linux kernel did not properly validate target size     during certain memory allocations. A local attacker could use this to cause a denial of service (system     crash). (CVE-2023-52429, CVE-2024-23851)

    Yang Chaoming discovered that the KSMBD implementation in the Linux kernel did not properly validate     request buffer sizes, leading to an out-of-bounds read vulnerability. An attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2024-22705)

    Chenyuan Yang discovered that the btrfs file system in the Linux kernel did not properly handle read     operations on newly created subvolumes in certain conditions. A local attacker could use this to cause a     denial of service (system crash). (CVE-2024-23850)

    It was discovered that a race condition existed in the Bluetooth subsystem in the Linux kernel, leading to     a null pointer dereference vulnerability. A privileged local attacker could use this to possibly cause a     denial of service (system crash). (CVE-2024-24860)

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - Architecture specifics;

    - Block layer;

    - Cryptographic API;

    - Android drivers;

    - EDAC drivers;

    - GPU drivers;

    - Media drivers;

    - Multifunction device drivers;

    - MTD block device drivers;

    - Network drivers;

    - NVME drivers;

    - TTY drivers;

    - Userspace I/O drivers;

    - EFI Variable file system;

    - F2FS file system;

    - GFS2 file system;

    - SMB network file system;

    - BPF subsystem;

    - IPv6 Networking;

    - Network Traffic Control;

    - AppArmor security module; (CVE-2023-52463, CVE-2023-52445, CVE-2023-52462, CVE-2023-52609,     CVE-2023-52448, CVE-2023-52457, CVE-2023-52464, CVE-2023-52456, CVE-2023-52454, CVE-2023-52438,     CVE-2023-52480, CVE-2023-52443, CVE-2023-52442, CVE-2024-26631, CVE-2023-52439, CVE-2023-52612,     CVE-2024-26598, CVE-2024-26586, CVE-2024-26589, CVE-2023-52444, CVE-2023-52436, CVE-2024-26633,     CVE-2024-26597, CVE-2023-52458, CVE-2024-26591, CVE-2023-52449, CVE-2023-52467, CVE-2023-52441,     CVE-2023-52610, CVE-2023-52451, CVE-2023-52469, CVE-2023-52470)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6725-1 advisory.

    Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate     certain data structure fields when parsing lease contexts, leading to an out-of-bounds read vulnerability.
    A remote attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-1194)

    Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel,     leading to a use-after-free vulnerability. A remote attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2023-32254)

    It was discovered that a race condition existed in the KSMBD implementation in the Linux kernel when     handling session connections, leading to a use- after-free vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-32258)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes     in certain operations, leading to an integer underflow and out-of-bounds read vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-38427)

    Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate SMB     request protocol IDs, leading to a out-of- bounds read vulnerability. A remote attacker could possibly use     this to cause a denial of service (system crash). (CVE-2023-38430)

    Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate     packet header sizes in certain situations, leading to an out-of-bounds read vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-38431)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly handle session setup     requests, leading to an out-of-bounds read vulnerability. A remote attacker could use this to expose     sensitive information. (CVE-2023-3867)

    Pratyush Yadav discovered that the Xen network backend implementation in the Linux kernel did not properly     handle zero length data request, leading to a null pointer dereference vulnerability. An attacker in a     guest VM could possibly use this to cause a denial of service (host domain crash). (CVE-2023-46838)

    It was discovered that the IPv6 implementation of the Linux kernel did not properly manage route cache     memory usage. A remote attacker could use this to cause a denial of service (memory exhaustion).
    (CVE-2023-52340)

    It was discovered that the device mapper driver in the Linux kernel did not properly validate target size     during certain memory allocations. A local attacker could use this to cause a denial of service (system     crash). (CVE-2023-52429, CVE-2024-23851)

    Yang Chaoming discovered that the KSMBD implementation in the Linux kernel did not properly validate     request buffer sizes, leading to an out-of-bounds read vulnerability. An attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2024-22705)

    Chenyuan Yang discovered that the btrfs file system in the Linux kernel did not properly handle read     operations on newly created subvolumes in certain conditions. A local attacker could use this to cause a     denial of service (system crash). (CVE-2024-23850)

    It was discovered that a race condition existed in the Bluetooth subsystem in the Linux kernel, leading to     a null pointer dereference vulnerability. A privileged local attacker could use this to possibly cause a     denial of service (system crash). (CVE-2024-24860)

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - Architecture specifics;

    - Block layer;

    - Cryptographic API;

    - Android drivers;

    - EDAC drivers;

    - GPU drivers;

    - Media drivers;

    - Multifunction device drivers;

    - MTD block device drivers;

    - Network drivers;

    - NVME drivers;

    - TTY drivers;

    - Userspace I/O drivers;

    - EFI Variable file system;

    - F2FS file system;

    - GFS2 file system;

    - SMB network file system;

    - BPF subsystem;

    - IPv6 Networking;

    - Network Traffic Control;

    - AppArmor security module; (CVE-2023-52463, CVE-2023-52445, CVE-2023-52462, CVE-2023-52609,     CVE-2023-52448, CVE-2023-52457, CVE-2023-52464, CVE-2023-52456, CVE-2023-52454, CVE-2023-52438,     CVE-2023-52480, CVE-2023-52443, CVE-2023-52442, CVE-2024-26631, CVE-2023-52439, CVE-2023-52612,     CVE-2024-26598, CVE-2024-26586, CVE-2024-26589, CVE-2023-52444, CVE-2023-52436, CVE-2024-26633,     CVE-2024-26597, CVE-2023-52458, CVE-2024-26591, CVE-2023-52449, CVE-2023-52467, CVE-2023-52441,     CVE-2023-52610, CVE-2023-52451, CVE-2023-52469, CVE-2023-52470)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote Ubuntu 22.04 LTS / 23.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6338-2 advisory.

    Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained a use-after-free     vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2023-21255)

    It was discovered that a race condition existed in the f2fs file system in the Linux kernel, leading to a     null pointer dereference vulnerability. An attacker could use this to construct a malicious f2fs image     that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-2898)

    It was discovered that the DVB Core driver in the Linux kernel did not properly handle locking events in     certain situations. A local attacker could use this to cause a denial of service (kernel deadlock).
    (CVE-2023-31084)

    Quentin Minster discovered that the KSMBD implementation in the Linux kernel did not properly handle     session setup requests. A remote attacker could possibly use this to cause a denial of service (memory     exhaustion). (CVE-2023-32247)

    Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel     when handling sessions operations. A remote attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-32250, CVE-2023-32252, CVE-2023-32257)

    It was discovered that a race condition existed in the KSMBD implementation in the Linux kernel when     handling session connections, leading to a use- after-free vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-32258)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes     in certain operations, leading to an out-of- bounds read vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-38426,     CVE-2023-38428)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly calculate the size of     certain buffers. A remote attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2023-38429)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote Ubuntu 23.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6344-1 advisory.

    Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained a use-after-free     vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2023-21255)

    It was discovered that a race condition existed in the f2fs file system in the Linux kernel, leading to a     null pointer dereference vulnerability. An attacker could use this to construct a malicious f2fs image     that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-2898)

    It was discovered that the DVB Core driver in the Linux kernel did not properly handle locking events in     certain situations. A local attacker could use this to cause a denial of service (kernel deadlock).
    (CVE-2023-31084)

    Quentin Minster discovered that the KSMBD implementation in the Linux kernel did not properly handle     session setup requests. A remote attacker could possibly use this to cause a denial of service (memory     exhaustion). (CVE-2023-32247)

    Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel     when handling sessions operations. A remote attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-32250, CVE-2023-32252, CVE-2023-32257)

    It was discovered that a race condition existed in the KSMBD implementation in the Linux kernel when     handling session connections, leading to a use- after-free vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-32258)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes     in certain operations, leading to an out-of- bounds read vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-38426,     CVE-2023-38428)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly calculate the size of     certain buffers. A remote attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2023-38429)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote Ubuntu 22.04 LTS / 23.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6338-1 advisory.

    Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained a use-after-free     vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2023-21255)

    It was discovered that a race condition existed in the f2fs file system in the Linux kernel, leading to a     null pointer dereference vulnerability. An attacker could use this to construct a malicious f2fs image     that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-2898)

    It was discovered that the DVB Core driver in the Linux kernel did not properly handle locking events in     certain situations. A local attacker could use this to cause a denial of service (kernel deadlock).
    (CVE-2023-31084)

    Quentin Minster discovered that the KSMBD implementation in the Linux kernel did not properly handle     session setup requests. A remote attacker could possibly use this to cause a denial of service (memory     exhaustion). (CVE-2023-32247)

    Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel     when handling sessions operations. A remote attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-32250, CVE-2023-32252, CVE-2023-32257)

    It was discovered that a race condition existed in the KSMBD implementation in the Linux kernel when     handling session connections, leading to a use- after-free vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-32258)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes     in certain operations, leading to an out-of- bounds read vulnerability. A remote attacker could use this     to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-38426,     CVE-2023-38428)

    It was discovered that the KSMBD implementation in the Linux kernel did not properly calculate the size of     certain buffers. A remote attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2023-38429)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

ID	Name	Product	Family	Severity
204441	Photon OS 5.0: Linux PHSA-2024-5.0-0187	Nessus	PhotonOS Local Security Checks	critical
193375	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel (AWS) vulnerabilities (USN-6725-2)	Nessus	Ubuntu Local Security Checks	critical
193084	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6725-1)	Nessus	Ubuntu Local Security Checks	critical
181189	Ubuntu 22.04 LTS / 23.04 : Linux kernel vulnerabilities (USN-6338-2)	Nessus	Ubuntu Local Security Checks	critical
180558	Ubuntu 23.04 : Linux kernel (Azure) vulnerabilities (USN-6344-1)	Nessus	Ubuntu Local Security Checks	critical
180511	Ubuntu 22.04 LTS / 23.04 : Linux kernel vulnerabilities (USN-6338-1)	Nessus	Ubuntu Local Security Checks	critical

Detections

Analytics

CVE-2023-32258

high

Tenable Plugins

critical

critical

critical

critical

critical

critical