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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-1229— Cisco NX-OS Software ICMP Version 6 Memory Leak Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco NX-OS Software
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.

Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software中的ICMP版本6（ICMPv6）存在安全漏洞，该漏洞源于允许未经身份验证的远程攻击者造成缓慢的系统内存泄漏。

CVSS 5.8 · Medium EPSS 1.43% · P72

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-1229

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Cisco NX-OS Software ICMP Version 6 Memory Leak Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in ICMP Version 6 (ICMPv6) processing in Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a slow system memory leak, which over time could lead to a denial of service (DoS) condition. This vulnerability is due to improper error handling when an IPv6-configured interface receives a specific type of ICMPv6 packet. An attacker could exploit this vulnerability by sending a sustained rate of crafted ICMPv6 packets to a local IPv6 address on a targeted device. A successful exploit could allow the attacker to cause a system memory leak in the ICMPv6 process on the device. As a result, the ICMPv6 process could run out of system memory and stop processing traffic. The device could then drop all ICMPv6 packets, causing traffic instability on the device. Restoring device functionality would require a device reboot.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco NX-OS Software 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software中的ICMP版本6（ICMPv6）存在安全漏洞，该漏洞源于允许未经身份验证的远程攻击者造成缓慢的系统内存泄漏。
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
Cisco Cisco NX-OS Software n/a -

II. Public POCs for CVE-2021-1229

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-1229

请登录查看更多情报信息。

Same Patch Batch · Cisco · 2021-02-24 · 13 CVEs total

CVE-2021-1388 10.0 CRITICAL Cisco ACI Multi-Site Orchestrator Application Services Engine Deployment Authentication By
CVE-2021-1361 9.8 CRITICAL Cisco NX-OS Software Unauthenticated Arbitrary File Actions Vulnerability
CVE-2021-1393 9.8 CRITICAL Cisco Application Services Engine Unauthorized Access Vulnerabilities
CVE-2021-1396 9.8 CRITICAL Cisco Application Services Engine Unauthorized Access Vulnerabilities
CVE-2021-1368 8.8 HIGH Cisco FXOS and NX-OS Software Unidirectional Link Detection Denial of Service and Arbitrar
CVE-2021-1230 8.6 HIGH Cisco Nexus 9000 Series Fabric Switches ACI Mode BGP Route Installation Denial of Service
CVE-2021-1387 8.6 HIGH Cisco NX-OS Software IPv6 Netstack Denial of Service Vulnerability
CVE-2021-1228 7.4 HIGH Cisco Nexus 9000 Series Fabric Switches ACI Mode Fabric Infrastructure VLAN Unauthorized A
CVE-2021-1450 5.5 MEDIUM Cisco AnyConnect Secure Mobility Client Denial of Service Vulnerability
CVE-2021-1231 4.7 MEDIUM Cisco Nexus 9000 Series Fabric Switches ACI Mode Link Layer Discovery Protocol Port Denial
CVE-2021-1367 4.3 MEDIUM Cisco NX-OS Software Protocol Independent Multicast Denial of Service Vulnerability
CVE-2021-1227 Cisco NX-OS Software NX-API Cross-Site Request Forgery Vulnerability

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-401

V. Comments for CVE-2021-1229

No comments yet

Leave a comment