Out-of-bounds read in Linux kernel - CVE-2023-4458

Vulnerability identifier: #VU92187

CSH Severity: Medium

CVSS v4 BT: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-4458

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when parsing extended attributes within the smb2_open() function in ksmbd. A remote non-authenticated attacker can send specially crafted requests to the daemon, trigger an out-of-bounds read error and read contents of memory on the system.

Linux kernel
openEuler
kernel-debuginfo
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
bpftool-debuginfo
bpftool

Install updates from vendor's website.

kernel-debuginfo - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
python3-perf-debuginfo - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
python3-perf - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
perf-debuginfo - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
perf - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel-tools-devel - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel-tools-debuginfo - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel-tools - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel-source - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel-headers - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel-devel - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
kernel-debugsource - addressed in versions 5.10.0-276.0.0.178, 5.10.0-276.0.0.179
bpftool-debuginfo - update to 5.10.0-276.0.0.179
bpftool - update to 5.10.0-276.0.0.179

• https://www.zerodayinitiative.com/advisories/ZDI-24-590/
• https://lore.kernel.org/all/20230825144848.9034-1-linkinjeon@kernel.org/

• Information disclosure in Linux kernel ksmbd
• openEuler 22.03 LTS SP3 update for kernel
• openEuler 22.03 LTS SP4 update for kernel