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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2343 JSA11027 - 2020-07 Security Bulletin: Junos OS: A race condition on receipt of crafted LLDP packets leads to a memory leak and an LLDP crash. (CVE-2020-1641) 9 July 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Junos OS Publisher: Juniper Networks Operating System: Juniper Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-1641 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11027 - --------------------------BEGIN INCLUDED TEXT-------------------- 2020-07 Security Bulletin: Junos OS: A race condition on receipt of crafted LLDP packets leads to a memory leak and an LLDP crash. (CVE-2020-1641) Article ID : JSA11027 Last Updated: 08 Jul 2020 Version : 1.0 Product Affected: This issue affects Junos OS 12.3, 12.3X48, 15.1, 15.1X49, 15.1X53, 16.1, 17.1, 17.2, 17.3, 17.4, 18.1, 18.2, 18.2X75, 18.3, 18.4, 19.1. Problem: A Race Condition vulnerability in Juniper Networks Junos OS LLDP implementation allows an attacker to cause LLDP to crash leading to a Denial of Service (DoS). This issue occurs when crafted LLDP packets are received by the device from an adjacent device. Multiple LACP flaps will occur after LLDP crashes. An indicator of compromise is to evaluate log file details for lldp with RLIMIT. Intervention should occur before 85% threshold of used KB versus maximum available KB memory is reached. show log messages | match RLIMIT | match lldp | last 20 Matching statement is " /kernel: %KERNEL-[number]: Process ([pid #],lldpd) has exceeded 85% of RLIMIT_DATA: " with [] as variable data to evaluate for. This issue affects: Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D95; 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D200; 15.1X53 versions prior to 15.1X53-D593; 16.1 versions prior to 16.1R7-S7; 17.1 versions prior to 17.1R2-S11, 17.1R3-S2; 17.2 versions prior to 17.2R1-S9, 17.2R3-S3; 17.3 versions prior to 17.3R2-S5, 17.3R3-S6; 17.4 versions prior to 17.4R2-S4, 17.4R3; 18.1 versions prior to 18.1R3-S5; 18.2 versions prior to 18.2R2-S7, 18.2R3; 18.2X75 versions prior to 18.2X75-D12, 18.2X75-D33, 18.2X75-D50, 18.2X75-D420; 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R2; 19.1 versions prior to 19.1R1-S4, 19.1R2. The following minimal configuration is required: [protocols lldp] 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-2020-1641 . Solution: The following software releases have been updated to resolve this specific issue: 12.3R12-S15, 12.3X48-D95, 15.1R7-S6, 15.1X49-D200, 15.1X53-D593, 16.1R7-S7, 16.1R7-S7, 17.1R2-S11, 17.1R3-S2, 17.2R1-S9, 17.2R3-S3, 17.3R2-S5, 17.3R3-S6, 17.4R2-S4, 17.4R3, 18.1R3-S5, 18.2R2-S7, 18.2R3, 18.2X75-D33, 18.2X75-D50, 18.2X75-D420, 18.3R1-S7, 18.3R2-S3, 18.3R3, 18.4R1-S5, 18.4R2, 19.1R1-S4, 19.1R2, 19.2R1, and all subsequent releases. This issue is being tracked as 1410239 . Workaround: Customers may disable LLDP "protocol lldp" or apply firewall filters to block LLDP traffic on ingress interfaces. There are no other known workarounds. Implementation: Software release Service Packages are available at http://support.juniper.net from the "Download Software" links. Modification History: 2020-07-08: Initial publication CVSS Score: 6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Severity Level: Medium 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 auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXwZ/J+NLKJtyKPYoAQgk+w//Zmd4oeeEUvjf3WwRlAws5l/0pb15N1qk cA61dAfxhWs49+bf7ne/0exF6s6+a9ayGRc4JMRGohi1uZbidc61oa7KXsaL+ha/ 3zg5rpVpYrzVi8talLOlMeBLFp3wS216wJJUmu3vFLD8i8lSHaviILIBwBjJRmYj 9y+qwitlARcxuAV4C3bzzSonDln0IPGIdXKxaLw88t1M4pWPBJvO0ihLavdQSaY0 WzFdksj3x/QDmbE5UquRDd9aXjw7q3WQUt7CtWZ0zfWANcznSJrRZQcVsLzw/nHB I+jATH7ZfSYmK7j/0n/cVgn5OJ+rK0at0JbyN3iazU3oaowX7v+TOzyNKru7jbLY zS9nzdJOBoSLMsT/D86QHQ5vEUQjuwzwohNMJXvyd4/WJ/b02CInjRTh4Y+yx+KT WAa8cty4GGMbmM+izVRPa5XPLOmwiWJKmTvN7Qzyns20WzfK8rKciZFvJg8awSbH 9jDb9zyRGq2FVAtbyv6aCh7aOLIk/EmMN3yLFMaWBM2zxIke8Wj+fjIG1D0CACS5 XmwQmCAUBn+k3hqaMvVo9SOUcDOYa+dOYsWC2bNzV11foyO0z9EqZfl0dlmhJbpc 9yHEA6L7eO+40Cyw5psLEEvD+Jt1/hbI3JfTEsBWw+jBcwCfEalB4zhkJHCeTdwP tL1sjQHPZn4= =NHnq -----END PGP SIGNATURE-----