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CVE-2011-4869

Quick assessment

Affected
n/a n/a
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.

Unbound是荷兰NLnet实验室负责维护的一套基于C语言的开源递归式DNS服务器软件。 Unbound 1.4.13p2之前版本中存在漏洞，该漏洞源于validator/val_nsec3.c对NSEC3-signed区域未正确执行校验处理。远程DNS服务器可借助缺少预期的NSEC3记录的特制响应导致拒绝服务（守护进程崩溃）。

AI Predicted 7.5 Difficulty: Easy EPSS 2.99% · P87
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I. Basic Information for CVE-2011-4869

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Unbound 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Unbound是荷兰NLnet实验室负责维护的一套基于C语言的开源递归式DNS服务器软件。 Unbound 1.4.13p2之前版本中存在漏洞，该漏洞源于validator/val_nsec3.c对NSEC3-signed区域未正确执行校验处理。远程DNS服务器可借助缺少预期的NSEC3记录的特制响应导致拒绝服务（守护进程崩溃）。
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
- n/a n/a -

II. Public POCs for CVE-2011-4869

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III. Intelligence Information for CVE-2011-4869

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Vendor Advisories for CVE-2011-4869 (5)

Mailing List Discussions for CVE-2011-4869 (2)

Other References for CVE-2011-4869 (1)

Same Patch Batch · n/a · 2011-12-20 · 4 CVEs total

CVE-2011-4723 D-Link DIR-300路由器加密问题漏洞
CVE-2011-4528 Unbound资源管理错误漏洞
CVE-2011-4717 zFTPServer ‘rmdir’ 目录遍历漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2011-4869

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