25 February 2022
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.0830 JSA11284 - 2022-01 Security Bulletin: MX Series and SRX series: Flowd core observed if the SIP ALG is enabled and a specific Session Initiation Protocol (SIP) packet is received (CVE-2022-22178) 25 February 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Junos OS Publisher: Juniper Networks Operating System: Juniper Resolution: Patch/Upgrade CVE Names: CVE-2022-22178 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11284 Comment: CVSS (Max): 7.5 CVE-2022-22178 (CVSSv3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVSS Source: NVD Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- 2022-01 Security Bulletin: MX Series and SRX series: Flowd core observed if the SIP ALG is enabled and a specific Session Initiation Protocol (SIP) packet is received (CVE-2022-22178) Article ID : JSA11284 Last Updated: 24 Feb 2022 Version : 2.0 Product Affected: This issue affects Junos OS 20.4, 21.1, 21.2, 21.3. Affected platforms: MX Series, SRX series. Problem: A Stack-based Buffer Overflow vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on MX Series and SRX series allows an unauthenticated networked attacker to cause a flowd crash and thereby a Denial of Service (DoS). Continued receipt of these specific packets will cause a sustained Denial of Service condition. This issue can be triggered by a specific Session Initiation Protocol (SIP) invite packet if the SIP ALG is enabled. Due to this, the PIC will be rebooted and all traffic that traverses the PIC will be dropped. This issue affects: Juniper Networks Junos OS o 20.4 versions prior to 20.4R3-S2; o 21.1 versions prior to 21.1R2-S1, 21.1R3; o 21.2 versions prior to 21.2R2; o 21.3 versions prior to 21.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1. To be affected the SIP ALG needs to be enabled, either implicitly / by default or by way of configuration. Please verify on SRX with: user@host> show security alg status | match sip SIP : Enabled Please verify on MX whether the following is configured: [ services ... rule <rule-name> (term <term-name>) from/match application/ application-set <name> ] where either a. name = junos-sip or an application or application-set refers to SIP: b. [ applications application <name> application-protocol sip ] or c. [ applications application-set <name> application junos-sip ] Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue was seen during production usage. This issue has been assigned CVE-2022-22178 . Solution: The following software releases have been updated to resolve this specific issue: 20.4R3-S2, 21.1R2-S1, 21.1R3, 21.2R2, 21.2R3, 21.3R2, 21.4R1, and all subsequent releases. This issue is being tracked as 1615438 . Workaround: There are no viable workarounds for this issue. Implementation: Software releases or updates are available for download at https:// support.juniper.net/support/downloads/ Modification History: 2022-01-12: Initial Publication 2022-02-24: MX affected configuration corrected CVSS Score: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Severity Level: High Severity Assessment: Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories." - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYhhgG+NLKJtyKPYoAQgzqA//bVJO9g9mn2FRDwH2BvxQiJ58gkcOeb4r c4KNMgyDOi1f3c5QODw6injqYXXl0eQSyIwRsc6UaFgTO+U3F659+eD4QmE/8OC+ 3LAVtW/OYIIf4jWx3nJbj2JlhZgf/BjGxNkwJ3SS82NUwtUj72SJmMYqoxK9iC0r fatRfY57+Gie9cBuHz/huACogEwduwKveJYS9qzN4SxEZ7lmNfBhlzDfVSsZ2KhI mmEuhrubyXOvPDaxc43l54y5R+f5b7MaZCfZ1hyFkoOgn3z0EfTRxUw6QfPy/6RL lD2aJCZbzHY2kBjn6P6V7wjRVBT8lhbzM0nTU06GPAagSL73NHOlFNy5eRyHg/me URDjAL2zRuRnBFBNISyexRsQiIEkCerby4gzTWD1UxZq8U9HkO0p1fosbM9FOIQa Z95dLlnKLy7eSosrLo3N587ssfwK7MBGLIfH+d1WzTQjloDvc5OyimuvB9zld3zl 5cGARS/u6FGdPObLSag1CG8h88H/SeqBIJ57dynJcxr1AKZbCbbXuwJvW/4wCgnZ VSPvmgcE52YU3HyR7S8eFG37ut+/6wuGbmDPnX+bCFoGM/ZwULa/4iQYhAuiTYHK pAqx3d7WSldjXVNSl8J7tPxlbPCE/egsAIsKhilhgD3YUX+IUflPkBcVKsAmQrIn ZJb7/mvBGQw= =ujUi -----END PGP SIGNATURE-----