PT-2023-9747 · Linux+2 · Linux Kernel+2

Published 2023-09-16 · Updated 2024-11-20 · CVE-2023-52828

Positive Technologies (AI Summary)

CVSS v3.1

6.6

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the BPF (Berkeley Packet Filter) program in the Linux kernel. When the bpf throw kfunc is called, it triggers dead code elimination in an unprecedented way, causing any instruction following the bpf throw call to never be marked as seen. This can lead to unreliable stack unwinding of BPF programs, resulting in a panic. The problem occurs when the final instruction emitted is a call to bpf throw or a subprogram that always throws, causing the return address to lie outside the program's boundaries.

To resolve this issue, bpf prog ksym find should treat IP == ksym.end as part of the BPF program, allowing is bpf text address to return true and enabling reliable unwinding when the final instruction is a call instruction.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

BDU:2024-10414

CVE-2023-52828

Affected Products

Astra Linux

Linux Kernel

Red Os

References · 32

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52828.json · Exploit
• https://git.kernel.org/stable/c/327b92e8cb527ae097961ffd1610c720481947f5 · Patch
• https://git.kernel.org/stable/c/aa42a7cb92647786719fe9608685da345883878f · Patch
• https://bdu.fstec.ru/vul/2024-10414 · Security Note
• https://git.kernel.org/stable/c/821a7e4143af115b840ec199eb179537e18af922 · Patch
• https://git.kernel.org/stable/c/cf353904a82873e952633fcac4385c2fcd3a46e1 · Patch
• https://git.kernel.org/stable/c/6058e4829696412457729a00734969acc6fd1d18 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-52828 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-52828 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-52828 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-52828 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-52828 · Security Note
• https://git.kernel.org/stable/c/66d9111f3517f85ef2af0337ece02683ce0faf21 · Patch
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=319139257 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52828 · Vendor Advisory