Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-3347— Samba: smb2 packet signing is not enforced when "server signing = required" is set

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
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.

Samba是用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在安全漏洞，该漏洞源于错误地执行了SMB2数据包签名。攻击者可利用该漏洞获取或修改敏感信息。

CVSS 5.9 · Medium EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-3347

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Samba: smb2 packet signing is not enforced when "server signing = required" is set
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured "server signing = required" or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Samba 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Samba是用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在安全漏洞，该漏洞源于错误地执行了SMB2数据包签名。攻击者可利用该漏洞获取或修改敏感信息。
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
Red Hat Red Hat Enterprise Linux 8 0:4.17.5-3.el8_8 ~ * cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat Red Hat Enterprise Linux 8 0:4.17.5-3.el8_8 ~ * cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat Red Hat Enterprise Linux 9 0:4.17.5-103.el9_2 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:4.17.5-103.el9_2 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
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 Storage 3 - cpe:/a:redhat:storage:3

II. Public POCs for CVE-2023-3347

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-3347

请登录查看更多情报信息。

Vendor Advisories for CVE-2023-3347 (6)

Mailing List Discussions for CVE-2023-3347 (2)

Other References for CVE-2023-3347 (1)

Same Patch Batch · Red Hat · 2023-07-20 · 5 CVEs total

CVE-2023-34966 7.5 HIGH Samba: infinite loop in mdssvc rpc service for spotlight
CVE-2022-2127 5.9 MEDIUM Samba: out-of-bounds read in winbind auth_crap
CVE-2023-34968 5.3 MEDIUM Samba: spotlight server-side share path disclosure
CVE-2023-34967 5.3 MEDIUM Samba: type confusion in mdssvc rpc service for spotlight

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 8
Same vendor: Red Hat
Same weakness: CWE-347

V. Comments for CVE-2023-3347

No comments yet

Leave a comment