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CVE-2021-20277

Quick assessment

Affected
n/a samba
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Samba是Samba团队的一套可使UNIX系列的操作系统与微软Windows操作系统的SMB/CIFS网络协议做连结的自由软件。该软件支持共享打印机、互相传输资料文件等。 Samba 存在缓冲区错误漏洞，攻击者可利用该漏洞可以通过AD DC LDAP Server强制读取无效地址，以触发拒绝服务，或获取敏感信息。

AI Predicted 5.3 Difficulty: Easy EPSS 4.33% · P91

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-20277

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Samba 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Samba是Samba团队的一套可使UNIX系列的操作系统与微软Windows操作系统的SMB/CIFS网络协议做连结的自由软件。该软件支持共享打印机、互相传输资料文件等。 Samba 存在缓冲区错误漏洞，攻击者可利用该漏洞可以通过AD DC LDAP Server强制读取无效地址，以触发拒绝服务，或获取敏感信息。
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
- samba samba 4.14.1, samba 4.13.6, samba 4.12.13 -

II. Public POCs for CVE-2021-20277

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-20277

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Vendor Advisories for CVE-2021-20277 (4)

Mailing List Discussions for CVE-2021-20277 (4)

Other References for CVE-2021-20277 (1)

Same Patch Batch · n/a · 2021-05-12 · 22 CVEs total

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CVE-2021-32611 Antisip eXosip 代码问题漏洞
CVE-2021-22155 Blackberry Workspaces Server 安全漏洞
CVE-2021-32572 Speco Technologies Speco Web Viewer 路径遍历漏洞
CVE-2021-30211 Knowage 跨站脚本漏洞
CVE-2021-30212 Knowage 跨站脚本漏洞
CVE-2021-30214 Knowage 注入漏洞
CVE-2021-30213 Knowage 跨站脚本漏洞
CVE-2020-19274 DhCms 跨站脚本漏洞
CVE-2020-19275 DhCms 输入验证错误漏洞
CVE-2020-18165 LAOBANCMS 跨站脚本漏洞

Showing top 20 of 22 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: samba
Same vendor: n/a
Same weakness: CWE-125

V. Comments for CVE-2021-20277

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