Denial of service when handling PPPoE messages in Junos OS smgd



Published: 2022-01-13
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-22160
CWE-ID CWE-388
Exploitation vector Local network
Public exploit N/A
Vulnerable software
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Juniper Junos OS
Operating systems & Components / Operating system

Vendor

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Error Handling

EUVDB-ID: #VU59594

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-22160

CWE-ID: CWE-388 - Error Handling

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper error handling in the subscriber management daemon (smgd). In a subscriber management / broadband edge environment if a single session group configuration contains dual-stack and a pp0 interface, smgd will crash and restart every time a PPPoE client sends a specific message.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: before 18.4R3-S10, 19.1R2-S3, 19.1R3-S7, 19.2R1-S8, 19.2R3-S4, 19.3R3-S4, 19.4R3-S5, 20.1R3-S3, 20.2R3-S3, 20.3R3-S2, 20.4R3, 21.1R3, 21.2R2, 21.3R1

CPE2.3 External links

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11268&cat=SIRT_1&actp=LIST

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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