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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3433 JSA11213 - 2021-10 Security Bulletin: Junos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet (CVE-2021-0299) 15 October 2021 =========================================================================== 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-2021-0299 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11213 - --------------------------BEGIN INCLUDED TEXT-------------------- 2021-10 Security Bulletin: Junos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet (CVE-2021-0299) Article ID : JSA11213 Last Updated: 13 Oct 2021 Version : 1.0 Product Affected: This issue affects Junos OS 19.4, 20.1, 20.2. Problem: An Improper Handling of Exceptional Conditions vulnerability in the processing of a transit or directly received malformed IPv6 packet in Juniper Networks Junos OS results in a kernel crash, causing the device to restart, leading to a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects systems with IPv6 configured. Devices with only IPv4 configured are not vulnerable to this issue. This issue affects Juniper Networks Junos OS: o 19.4 versions prior to 19.4R3; o 20.1 versions prior to 20.1R2; o 20.2 versions prior to 20.2R1-S1, 20.2R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.4R1. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue was found during internal product security testing or research. This issue has been assigned CVE-2021-0299 . Solution: The following software releases have been updated to resolve this specific issue: Junos OS 19.4R3, 20.1R2, 20.2R1-S1, 20.2R2, 20.3R1, and all subsequent releases. This issue is being tracked as 1515835 . 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: 2021-10-13: Initial Publication. 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. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. 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: auscert@auscert.org.au 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 iQIVAwUBYWj9lONLKJtyKPYoAQipSg/+JvDeZ/3Ajb+CfCJh9Dq7h7CDbFDE2v+W JMyeI6c7GXarIsY5c99mWhtqVDLvnnVsIbUGmNO4vaMNr+QSAORSpuruhFgdpPWB pvjOJ7umdJBS0Z3j1VHENyBErKFyfYBEThJahgzBVKXxVdxwh6F273dF1I1HeFJd ceY4Sa7SufgZxwJaYDXRUeR9xJLMeZ7VyFS4Jp+50ex0mLafGG/Omo84BxyNgXbC JtWMMxey8UsmXvesxciZp/m850bqf0uBPc73Yzp4iXtr+n+XBWnmkh32IiUMRppk IRKV5US7baiUhU0sV/DZgN7XhZpZswF6Gy3K84aI34b5TCIDBKc+aF0FdTEBIjO/ qL36j2x1BrvpLUdSLvIx8yav7Zn1C7VoFIzLENJe4W+j+JtR39FqXfQswCfZxVhQ Hx+vUizA9bBwytrDoSmrSbDrke07UK65VGbgwvHhhQLN86DWs/tKmest69s8flzp cxHhb/CadxZ6xSdiHPR12FuhjoR2rK0DtnApfhRSUdfA3s39A9NKHztM3rSgQJJc gnpMW5C24tv5bH+w6Kx5rhsBx9JN5p0uLPzmeGsIEUjL45T5hPVInAhS7YoPVLbA aathYgBRzl55yQZVJRSw95gFr0saj7h+1Bb1TXHcmwmoSpzC6C+Cnct6eqNbdLOq sqbpQX+xv70= =GDAg -----END PGP SIGNATURE-----