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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.1801 Junos: SRX flowd denial of service vulnerability related to ALGs (CVE-2014-3825) 9 October 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Juniper SRX Series Publisher: Juniper Networks Operating System: Juniper Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-3825 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10650 - --------------------------BEGIN INCLUDED TEXT-------------------- 2014-10 Security Bulletin: Junos: SRX flowd denial of service vulnerability related to ALGs (CVE-2014-3825) Categories: Junos SRX Series SIRT Advisory Security Advisories ID: JSA10650 Last Updated: 08 Oct 2014 Version: 1.0 PRODUCT AFFECTED: This issue can affect all SRX Series services gateways. PROBLEM: On SRX Series devices, when any ALG (Application Layer Gateway) is enabled, a certain crafted packet may cause the flowd process to crash. Repeated crashes of the flowd process constitutes an extended denial of service condition for the SRX Series device. The status of ALGs can be obtained by executing the 'show security alg status' CLI command. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. No other Juniper Networks products or platforms are affected by this issue. This issue has been assigned CVE-2014-3825. SOLUTION: The following software releases have been updated to resolve this specific issue: Junos OS 11.4R12-S4, 12.1X44-D40, 12.1X45-D30, 12.1X46-D25, 12.1X47-D10, and all subsequent releases. This issue is being tracked as PR 986369 and is visible on the Customer Support website. KB16765 - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies. WORKAROUND: Two available workarounds exist for this issue: Disable ALGs using the CLI command 'set security alg ____ disable' if ALGs are not required Enable flow-based processing for IPv6 traffic using the CLI command 'set security forwarding-options family inet6 mode flow-based' command (a device reboot is required) IMPLEMENTATION: How to obtain fixed software: Security vulnerabilities in Junos are fixed in the next available Maintenance Release of each supported Junos version. In some cases, a Maintenance Release is not planned to be available in an appropriate time-frame. For these cases, Service Releases are made available in order to be more timely. Security Advisory and Security Notices will indicate which Maintenance and Service Releases contain fixes for the issues described. Upon request to JTAC, customers will be provided download instructions for a Service Release. Although Juniper does not provide formal Release Note documentation for a Service Release, a list of "PRs fixed" can be provided on request. RELATED LINKS: KB16613: Overview of the Juniper Networks SIRT Monthly Security Bulletin Publication Process KB16765: In which releases are vulnerabilities fixed? KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories Report a Vulnerability - How to Contact the Juniper Networks Security Incident Response Team CVE-2014-3825: SRX flowd denial of service vulnerability related to SIP ALG CVSS SCORE: 7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C) RISK LEVEL: High RISK ASSESSMENT: Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories." 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBVDXupRLndAQH1ShLAQIxaw/+P/GfaBu2G+4WInfOZR6BpnvxUNUh6jnL KGWHvFiUCvVtBNWd1n36Twm9/4Sy3xfnhpco/ah6+U4OYUY3HpJa/7HBzMld5OtC 7oB85ld9d2bGmiU+DcNOSzsy+4uvX/lkb+P4aYC9/bvIUdWE7xrr+mbfzlJwswdl 4LB0hA9taPVxXqzkLm9L0IBGFN9N1BiDVmEm3Ajvt8fWEHwaDpoJjxERNu/ILVEm WXX5QO11MQ5w5ABg+OMjikicY0i2Y9CuCv9dEY72y8OX5bOrquwflH11hPVLSYtQ ZKgaWdGxhbKQss0rAayirwuXlhWTCWEp2vypFrQJ2M5H+dkkIvjvJqFG/JtAozcQ fG48eqAuyfQRtJf7jkKEUdeE7tTs/4QALpu5PchPZ9dr+qc/ofmEreA5rIaZ1mFn 4iyORy78KEmY6pKgpaggtlEPJxlgaAKY7NeRxJE2INy/ABb/G575CXU1YRqx4Gwu KyxbCZskQxHTjPpOfaP5NaQ4RpWERn7zVmq5xbw3hBI/qZlNGGbdBsnfUL89Dlmw xj6jpNfEzhHD+V6QlGHLefNnVfo/9dr7C3h4aqdGh5rXzeMEEVTKE0r7pUJdcdd9 e5cofu1IJ93o/ABCDDgoUIhZdwldkAJ4HUNACS6B4ySq3jzRX4qDtvJ4yjz6ts8e fTOR49QtX6I= =mIin -----END PGP SIGNATURE-----