juniper junos 使用共享资源的并发执行不恰当同步问题（竞争条件）

CVE编号

CVE-2021-0270

利用情况

暂无

补丁情况

N/A

披露时间

2021-04-23

漏洞描述

On PTX Series and QFX10k Series devices with the "inline-jflow" feature enabled, a use after free weakness in the Packet Forwarding Engine (PFE) microkernel architecture of Juniper Networks Junos OS may allow an attacker to cause a Denial of Service (DoS) condition whereby one or more Flexible PIC Concentrators (FPCs) may restart. As this is a race condition situation this issue become more likely to be hit when network instability occurs, such as but not limited to BGP/IGP reconvergences, and/or further likely to occur when more active "traffic flows" are occurring through the device. When this issue occurs, it will cause one or more FPCs to restart unexpectedly. During FPC restarts core files will be generated. While the core file is generated traffic will be disrupted. Sustained receipt of large traffic flows and reconvergence-like situations may sustain the Denial of Service (DoS) situation. This issue affects: Juniper Networks Junos OS: 18.1 version 18.1R2 and later versions prior to 18.1R3-S10 on PTX Series, QFX10K Series.

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://kb.juniper.net/JSA11161
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/i...

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	juniper	junos	18.1	-
	运行在以下环境
	硬件	juniper	ptx1000	-	-
	运行在以下环境
	硬件	juniper	ptx10001-36mr	-	-
	运行在以下环境
	硬件	juniper	ptx10002	-	-
	运行在以下环境
	硬件	juniper	ptx10003	-	-
	运行在以下环境
	硬件	juniper	ptx10004	-	-
	运行在以下环境
	硬件	juniper	ptx10008	-	-
	运行在以下环境
	硬件	juniper	ptx10016	-	-
	运行在以下环境
	硬件	juniper	ptx3000	-	-
	运行在以下环境
	硬件	juniper	ptx5000	-	-
	运行在以下环境
	硬件	juniper	qfx10002	-	-
	运行在以下环境
	硬件	juniper	qfx10008	-	-
	运行在以下环境
	硬件	juniper	qfx10016	-	-

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-362	使用共享资源的并发执行不恰当同步问题（竞争条件）
CWE-416	释放后使用

Exp相关链接

- avd.aliyun.com