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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1742 Multiple vulnerabilities have been identified in Juniper SRX Series devices 13 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Juniper SRX Series Publisher: Juniper Networks Operating System: Juniper Impact/Access: Root Compromise -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-2346 CVE-2017-2343 Original Bulletin: https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10791 https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10794 Comment: This bulletin contains two (2) Juniper Networks security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- 2017-07 Security Bulletin: SRX Series: Hardcoded credentials in Integrated UserFW feature. (CVE-2017-2343) PRODUCT AFFECTED: This issue affects Junos OS 12.3X48, 15.1X49. Affected platforms: SRX series. PROBLEM: The Integrated User Firewall (UserFW) feature was introduced in Junos OS version 12.1X47-D10 on the Juniper SRX Series devices to provide simple integration of user profiles on top of the existing firewall polices. As part of an internal security review of the UserFW services authentication API, hardcoded credentials were identified and removed which can impact both the SRX Series device, and potentially LDAP and Active Directory integrated points. These credentials may be passed in clear text, or passed in an encrypted format. It may also be possible for a skilled attacker to illicitly decompile the system software to gain access to these credentials and form additional attacks. Credentials may be taken from the network via man-in-the-middle attacks, or other attack vectors, as above, or others not listed. An attacker may be able to completely compromise both the SRX Series device without authentication, other SRX Series devices deployed in the same environment running vulnerable versions of Junos OS, as well as Active Directory servers and service, including but not limited to, user accounts, workstations, servers performing other functions such as email, database, etc. which are also tied to the Active Directory deployment. Inter-Forest Active Directory deployments may also be at risk as the attacker may gain full administrative control over one or more Active Directories depending on the credentials supplied by the administrator of the AD domains and SRX devices performing integrated authentication of users, groups and devices. To identify if your device is potentially vulnerable to exploitation, check to see if the service is operating; from CLI review the following output: root@SRX-Firewall# run show services user-identification active-directory-access domain-controller status extensive A result of "Status: Connected" will indicate that the service is active on the device. To evaluate if user authentication is occurring through the device: root@SRX-Firewall# run show services user-identification active-directory-access active-directory-authentication-table all Next review the results to see if valid users and groups are returned. e.g. Domain: juniperlab.com Total entries: 3 Source IP Username groups state 172.16.26.1 administrator Valid 192.168.26.2 engg01 engineers Valid 192.168.26.3 guest01 guests Valid Domain: NULL Total entries: 8 Source IP Username groups state 192.168.26.4 Invalid 192.168.26.5 Invalid This will also indicate that Valid users and groups are authenticating through the device. Affected releases are Juniper Networks Junos OS 12.3X48 from 12.3X48-D30 and prior to 12.3X48-D35 on SRX series; 15.1X49 from 15.1X49-D40 and prior to 15.1X49-D50 on SRX series. Devices on any version of Junos OS 12.1X46, or 12.1X47 are unaffected by this issue. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue has been assigned CVE-2017-2343. SOLUTION: The following software releases have been updated to resolve this specific issue: 12.3X48-D35, 15.1X49-D50, and all subsequent releases. This issue is being tracked as PR 1171966 and is visible on the Customer Support website. WORKAROUND: There is no workaround to completely mitigate the risk of this issue. Customers may reduce the risk of exploitation of this issue by disabling the UserFW service on devices running the service until such time that a fix can be taken. IMPLEMENTATION: 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. MODIFICATION HISTORY: 2017-07-12: Initial Publication. 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 CVSS SCORE: 10 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) RISK LEVEL: Critical 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." - ---------- 2017-07 Security Bulletin: MS-MPC or MS-MIC crash when passing large fragmented traffic through an ALG (CVE-2017-2346) PRODUCT AFFECTED: This issue affects Junos OS 14.1X55, 14.2R, 15.1R, and 16.1R running on MX Series. PROBLEM: An MS-MPC or MS-MIC Service PIC may crash when large fragmented packets are passed through an Application Layer Gateway (ALG). Repeated crashes of the Service PC can result in an extended denial of service condition. The issue can be seen only if NAT or stateful-firewall rules are configured with ALGs enabled. This issue was caused by the code change for PR 1182910 in Junos OS 14.1X55-D30, 14.1X55-D35, 14.2R7, 15.1R5, and 16.1R2. No other versions of Junos OS and no other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS on MX platforms running: 14.1X55 from 14.1X55-D30 to releases prior to 14.1X55-D35; 14.2R from 14.2R7 to releases prior to 14.2R7-S4, 14.2R8; 15.1R from 15.1R5 to releases prior to 15.1R5-S2, 15.1R6; 16.1R from 16.1R2 to releases prior to 16.1R3-S2, 16.1R4. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue has been assigned CVE-2017-2346. SOLUTION: The following software releases have been updated to resolve this specific issue: 14.1X55-D35, 14.2R7-S4, 14.2R8, 15.1R5-S2, 15.1R6, 16.1R3-S2, 16.1R4, and all subsequent releases. This issue is being tracked as PR 1214134 and is visible on the Customer Support website. WORKAROUND: No known workaround exists for this issue. If NAT and stateful-firewall are not required, disabling them in the [edit applications] stanza will mitigate this issue. IMPLEMENTATION: 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. MODIFICATION HISTORY: 2017-07-12: Initial Publication. RELATED LINKS: KB16613: Overview of the Juniper Networks SIRT Quarterly 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-2017-2346: MS-MPC or MS-MIC crash when passing large fragmented traffic through an ALG CVSS SCORE: 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) RISK LEVEL: Medium 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." - --------------------------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: 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). 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