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CVE-2023-52442

Status Candidate

Overview

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in compound request `smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session() will always return the first request smb2 header in a compound request. if `SMB2_TREE_CONNECT_HE` is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound.

Related Files

Ubuntu Security Notice USN-6725-2
Posted Apr 17, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6725-2 - 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 or possibly expose sensitive information. 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 or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2023-1194, CVE-2023-32254, CVE-2023-32258, CVE-2023-38427, CVE-2023-38430, CVE-2023-38431, CVE-2023-3867, CVE-2023-46838, CVE-2023-52340, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52442, CVE-2023-52444
SHA-256 | 6d7cd6326721629b499ff1a4ed3916c1134b9cf7a03933ebb2aad8ffbd18a71d
Ubuntu Security Notice USN-6725-1
Posted Apr 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6725-1 - 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 or possibly expose sensitive information. 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 or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2023-1194, CVE-2023-32254, CVE-2023-32258, CVE-2023-38427, CVE-2023-38430, CVE-2023-38431, CVE-2023-3867, CVE-2023-46838, CVE-2023-52340, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52442, CVE-2023-52444
SHA-256 | 8d6d30178b2854c30f04f5326a65af3d2a2ce39d0ff00d49cba1cfec2df9734b
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