cisco asyncos 在移除最后引用时对内存的释放不恰当（内存泄露）

CVE编号

CVE-2021-34698

利用情况

暂无

补丁情况

N/A

披露时间

2021-10-07

漏洞描述

A vulnerability in the proxy service of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management in the proxy service of an affected device. An attacker could exploit this vulnerability by establishing a large number of HTTPS connections to the affected device. A successful exploit could allow the attacker to cause the system to stop processing new connections, which could result in a DoS condition. Note: Manual intervention may be required to recover from this situation.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-s...

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	系统	cisco	asyncos	*	From (including) 12.0	Up to (excluding) 12.0.3-005
	运行在以下环境
	系统	cisco	asyncos	*	From (including) 12.5	Up to (excluding) 12.5.2-007
	运行在以下环境
	系统	cisco	asyncos	*	From (including) 14.0	Up to (excluding) 14.0.1-014
	运行在以下环境
	硬件	cisco	web_security_appliance_s170	-	-
	运行在以下环境
	硬件	cisco	web_security_appliance_s190	-	-
	运行在以下环境
	硬件	cisco	web_security_appliance_s380	-	-
	运行在以下环境
	硬件	cisco	web_security_appliance_s390	-	-
	运行在以下环境
	硬件	cisco	web_security_appliance_s680	-	-
	运行在以下环境
	硬件	cisco	web_security_appliance_s690	-	-
	运行在以下环境
	硬件	cisco	web_security_appliance_s690x	-	-

CVSS3评分 7.5

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 无
• 影响范围 未更改
• 用户交互 无
• 可用性 高
• 保密性 无
• 完整性 无

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-ID	漏洞类型
CWE-401	在移除最后引用时对内存的释放不恰当（内存泄露）

Exp相关链接

- avd.aliyun.com