PT-2022-6038 · Linux+2 · Linux Kernel+2

Arnaud Gatignol + 4 · Published 2022-08-04 · Updated 2023-05-16 · CVE-2022-47942

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions 5.15 through 5.19 before 5.19.2

Description The issue is related to a heap-based buffer overflow in the Linux kernel's ksmbd subsystem, specifically in the set ntacl dacl function. This overflow is connected to the use of SMB2 QUERY INFO HE after a malformed SMB2 SET INFO HE command. The exploitation of this issue could allow a remote attacker to execute arbitrary code.

Recommendations For Linux kernel versions 5.15 through 5.19 before 5.19.2, update to version 5.19.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the set ntacl dacl function and the SMB2 QUERY INFO HE and SMB2 SET INFO HE commands until a patch is applied.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2022-2453

ALT-PU-2022-2470

ALT-PU-2022-2487

ALT-PU-2022-2497

ALT-PU-2022-2682

ALT-PU-2022-2692

ALT-PU-2022-2915

ALT-PU-2022-2919

AZL-12097

BDU:2022-07502

CVE-2022-47942

OESA-2023-1035

OESA-2023-1036

ZDI-22-1688

Affected Products

Alt Linux

Astra Linux

Linux Kernel

References · 47

• https://github.com/torvalds/linux/commit/8f0541186e9ad1b62accc9519cc2b7a7240272a7 · Patch
• https://osv.dev/vulnerability/OESA-2023-1035 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-47942 · Vendor Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-2196 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-22-1688 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-3903 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-3108 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-3115 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-47943 · Security Note
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8f0541186e9ad1b62accc9519cc2b7a7240272a7 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-47942 · Security Note
• https://ubuntu.com/security/CVE-2022-47942 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-47940 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-3104 · Security Note