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CVE-2023-1386— Qemu: 9pfs: suid/sgid bits not dropped on file write

Quick assessment

Affected
n/a qemu
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU存在安全漏洞，该漏洞源于9p passthrough filesystem在写入文件时没有丢弃SUID/SGID位，导致存在权限升级漏洞。

CVSS 3.3 · Low EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2023-1386

Vulnerability Information
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Vulnerability Title
Qemu: 9pfs: suid/sgid bits not dropped on file write
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. When a local user in the guest writes an executable file with SUID or SGID, none of these privileged bits are correctly dropped. As a result, in rare circumstances, this flaw could be used by malicious users in the guest to elevate their privileges within the guest and help a host local user to elevate privileges on the host.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
权限预留不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
QEMU 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU存在安全漏洞，该漏洞源于9p passthrough filesystem在写入文件时没有丢弃SUID/SGID位，导致存在权限升级漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- qemu - -
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization - cpe:/a:redhat:advanced_virtualization:8::el8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Fedora Fedora - -
Fedora Extra Packages for Enterprise Linux - -

II. Public POCs for CVE-2023-1386

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III. Intelligence Information for CVE-2023-1386

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Vendor Advisories for CVE-2023-1386 (3)

Other References for CVE-2023-1386 (2)

Same Patch Batch · n/a · 2023-07-24 · 18 CVEs total

CVE-2023-32257 8.1 HIGH Session race condition remote code execution vulnerability
CVE-2023-32258 8.1 HIGH Session race condition remote code execution vulnerability
CVE-2023-32248 7.5 HIGH Tree connection null pointer dereference denial-of-service vulnerability
CVE-2023-32252 7.5 HIGH Session null pointer dereference denial-of-service vulnerability
CVE-2023-32247 7.5 HIGH Session setup memory exhaustion denial-of-service vulnerability
CVE-2023-3863 6.4 MEDIUM Use-after-free in nfc_llcp_find_loca in net/nfc/llcp_core.c
CVE-2023-2860 4.4 MEDIUM Out-of-bounds read when setting hmac data
CVE-2023-3748 3.5 LOW Inifinite loop in babld message parsing may cause dos
CVE-2021-39421 SeedDMS 跨站脚本漏洞
CVE-2022-30280 Nokia NetAct 跨站请求伪造漏洞
CVE-2023-26077 Atera Agent 安全漏洞
CVE-2023-37613 Assembly Software Trialworks 跨站脚本漏洞
CVE-2023-26078 Atera Agent 安全漏洞
CVE-2022-28863 Nokia NetAct 代码问题漏洞
CVE-2022-28864 Nokia NetAct 安全漏洞
CVE-2022-28865 Nokia NetAct 跨站脚本漏洞
CVE-2022-28867 Nokia NetAct 跨站脚本漏洞

IV. Related Vulnerabilities

Same product: qemu
Same vendor: n/a
Same weakness: CWE-281

V. Comments for CVE-2023-1386

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