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CVE-2023-36833— Junos OS Evolved: PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202: The aftman-bt process will crash in a MoFRR scenario after multiple link flaps

Quick assessment

Affected
Juniper Networks Junos OS Evolved
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.

Juniper Networks Junos OS Evolved是美国瞻博网络（Juniper Networks）公司的Junos OS 的升级版系统。 Juniper Networks Junos OS Evolved存在资源管理错误漏洞，该漏洞源于数据包转发引擎(PFE)存在释放后重用漏洞。攻击者可利用该漏洞造成拒绝服务（DoS）。受影响的产品和版本：Juniper Networks Junos OS Evolved 21.2R1-EVO及更高版本；21.3R1-EVO及更高版本；21.4R3-S3

CVSS 6.5 · Medium EPSS 0.32% · P23
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I. Basic Information for CVE-2023-36833

Vulnerability Information
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Vulnerability Title
Junos OS Evolved: PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202: The aftman-bt process will crash in a MoFRR scenario after multiple link flaps
Source: CVE Program / CVE List V5
Vulnerability Description
A Use After Free vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS Evolved on PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202 allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS). The process 'aftman-bt' will crash after multiple flaps on a multicast-only fast reroute (MoFRR) enabled interface. This will cause the respective FPC to stop forwarding traffic and it needs to be rebooted to restore the service. An indication that the system experienced this issue is the following log message:   <date> <hostname> evo-aftmand-bt[<pid>]: [Error] jexpr_fdb: sanity check failed, ... , app_name L3 Mcast Routes This issue affects Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201/1202: 21.2 version 21.2R1-EVO and later versions; 21.3 version 21.3R1-EVO and later versions; 21.4 versions prior to 21.4R3-S3-EVO; 22.1 version 22.1R1-EVO and later versions; 22.2 versions prior to 22.2R3-S2-EVO; 22.3 versions prior to 22.3R3-EVO; 22.4 versions prior to 22.4R1-S2-EVO, 22.4R2-EVO.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS Evolved 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS Evolved是美国瞻博网络（Juniper Networks）公司的Junos OS 的升级版系统。 Juniper Networks Junos OS Evolved存在资源管理错误漏洞，该漏洞源于数据包转发引擎(PFE)存在释放后重用漏洞。攻击者可利用该漏洞造成拒绝服务（DoS）。受影响的产品和版本：Juniper Networks Junos OS Evolved 21.2R1-EVO及更高版本；21.3R1-EVO及更高版本；21.4R3-S3
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
Juniper Networks Junos OS Evolved 21.2 ~ 21.2* -

II. Public POCs for CVE-2023-36833

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III. Intelligence Information for CVE-2023-36833

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Other References for CVE-2023-36833 (1)

Same Patch Batch · Juniper Networks · 2023-07-14 · 12 CVEs total

CVE-2023-36835 7.5 HIGH Junos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet ha
CVE-2023-28985 7.5 HIGH SRX Series and MX Series: An FPC core is observed when IDP is enabled on the device and a
CVE-2023-36832 7.5 HIGH Junos OS: MX Series: PFE crash upon receipt of specific packet destined to an AMS interfac
CVE-2023-36831 7.5 HIGH Junos OS: SRX Series: jbuf memory leak when SSL Proxy and UTM Web-Filtering is applied
CVE-2023-36850 6.5 MEDIUM Junos OS: MX Series: An MPC will crash upon receipt of a malformed CFM packet.
CVE-2023-36849 6.5 MEDIUM Junos OS and Junos OS Evolved: The l2cpd will crash when a malformed LLDP packet is receiv
CVE-2023-36848 6.5 MEDIUM Junos OS: MX Series: The FPC will crash on receiving a malformed CFM packet
CVE-2023-36834 6.5 MEDIUM Junos OS: SRX 4600 and SRX 5000 Series: The receipt of specific genuine packets by SRXes c
CVE-2023-36840 5.5 MEDIUM Junos OS and Junos OS Evolved: An rpd crash occurs when a specific L2VPN command is run
CVE-2023-36838 5.5 MEDIUM Junos OS: SRX Series: A flowd core occurs when running a low privileged CLI command
CVE-2023-36836 4.7 MEDIUM Junos OS and Junos OS Evolved: In a MoFRR scenario an rpd core may be observed when a low

IV. Related Vulnerabilities

Same product: Junos OS Evolved
Same vendor: Juniper Networks
Same weakness: CWE-416

V. Comments for CVE-2023-36833

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