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CVE-2017-2346— MS-MPC or MS-MIC crash when passing large fragmented traffic through an ALG

Quick assessment

Affected
Juniper Networks Junos OS
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 MX Series是美国瞻博网络（Juniper Networks）公司的一款MX系列的路由器产品。Junos OS是使用在其中的一套操作系统。 Juniper MX Series设备中的Junos OS存在安全漏洞。远程攻击者可通过Application Layer Gateway (ALG)发送数据包片段利用该漏洞造成目标服务器崩溃。以下版本受到影响：Juniper Junos OS 14.1X55版本，14.2R版本，15.1R版本，16.1R版本。

AI Predicted 7.5 Difficulty: Easy EPSS 1.10% · P65

Possible ATT&CK Techniques 1 AI

T1210.003
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I. Basic Information for CVE-2017-2346

Vulnerability Information
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Vulnerability Title
MS-MPC or MS-MIC crash when passing large fragmented traffic through an ALG
Source: CVE Program / CVE List V5
Vulnerability Description
An MS-MPC or MS-MIC Service PIC may crash when large fragmented packets are passed through an Application Layer Gateway (ALG). Repeated crashes of the Service PC can result in an extended denial of service condition. The issue can be seen only if NAT or stateful-firewall rules are configured with ALGs enabled. This issue was caused by the code change for PR 1182910 in Junos OS 14.1X55-D30, 14.1X55-D35, 14.2R7, 15.1R5, and 16.1R2. No other versions of Junos OS and no other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS on MX platforms running: 14.1X55 from 14.1X55-D30 to releases prior to 14.1X55-D35; 14.2R from 14.2R7 to releases prior to 14.2R7-S4, 14.2R8; 15.1R from 15.1R5 to releases prior to 15.1R5-S2, 15.1R6; 16.1R from 16.1R2 to releases prior to 16.1R3-S2, 16.1R4.
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
Juniper MX Series设备Junos OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper MX Series是美国瞻博网络（Juniper Networks）公司的一款MX系列的路由器产品。Junos OS是使用在其中的一套操作系统。 Juniper MX Series设备中的Junos OS存在安全漏洞。远程攻击者可通过Application Layer Gateway (ALG)发送数据包片段利用该漏洞造成目标服务器崩溃。以下版本受到影响：Juniper Junos OS 14.1X55版本，14.2R版本，15.1R版本，16.1R版本。
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 14.1X55 from 14.1X55-D30 prior to 14.1X55-D35 -

II. Public POCs for CVE-2017-2346

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III. Intelligence Information for CVE-2017-2346

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Vendor Advisories for CVE-2017-2346 (2)

Same Patch Batch · Juniper Networks · 2017-07-14 · 20 CVEs total

CVE-2017-2338 ScreenOS: XSS vulnerability in ScreenOS Firewall
CVE-2017-2349 SRX Series: Command injection vulnerability in SRX IDP feature.
CVE-2017-2348 Junos OS: jdhcpd daemon crash due to invalid IPv6 UDP packets
CVE-2017-2347 Junos: Denial of Service vulnerability in rpd daemon
CVE-2017-2345 Junos: snmpd denial of service upon receipt of crafted SNMP packet
CVE-2017-2344 Junos: Buffer overflow in sockets library
CVE-2017-2343 SRX Series: Hardcoded credentials in Integrated UserFW feature.
CVE-2017-2342 SRX Series: MACsec failure to report errors
CVE-2017-2341 Junos OS: VM to host privilege escalation in platforms with Junos OS running in a virtuali
CVE-2017-2339 ScreenOS: XSS vulnerability in ScreenOS Firewall
CVE-2017-10601 Junos OS: Insufficient authentication for user login when a specific system configuration
CVE-2017-2337 ScreenOS: XSS vulnerability in ScreenOS Firewall
CVE-2017-2336 ScreenOS: XSS vulnerability in ScreenOS Firewall
CVE-2017-2335 ScreenOS: XSS vulnerability in ScreenOS Firewall
CVE-2017-2314 Junos: RPD crash due to malformed BGP OPEN message
CVE-2017-10605 Junos: SRX Series denial of service vulnerability in flowd due to crafted DHCP packet
CVE-2017-10604 Junos OS: SRX Series: Cluster configuration sync failures occur if the root user account i
CVE-2017-10603 Junos OS: Local XML Injection through CLI command can lead to privilege escalation
CVE-2017-10602 Junos OS: buffer overflow vulnerability in Junos CLI

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks

V. Comments for CVE-2017-2346

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