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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2556 JSA10940 - 2019-07 Security Bulletin: Junos OS: Multiple Vulnerabilities in OpenSSH 11 July 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Junos OS Publisher: Juniper Networks Operating System: Juniper Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-10012 CVE-2016-10011 CVE-2016-10010 CVE-2016-10009 CVE-2016-6515 CVE-2016-6210 CVE-2015-8325 CVE-2015-6564 Reference: ASB-2018.0293 ASB-2015.0090 ESB-2019.2463 ESB-2018.3084 Original Bulletin: http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10940 - --------------------------BEGIN INCLUDED TEXT-------------------- 2019-07 Security Bulletin: Junos OS: Multiple Vulnerabilities in OpenSSH Article ID: JSA10940 Last Updated: 10 Jul 2019 Version: 8.0 Product Affected: This issue affects all products and platforms running Junos OS Problem: Multiple vulnerabilities have been resolved in Junos OS by updating third party software included with Junos OS or by fixing vulnerabilities found during internal testing. These issues potentially affect Juniper Networks Junos OS: o 12.3X48 versions prior to 12.3X48-D55; o 12.3 versions prior to 12.3R12-S13; o 15.1X49 versions prior to 15.1X49-D100; o 15.1 versions prior to 15.1F6-S12, 15.1R5-S4, 15.1R6-S1, 15.1R7; o 16.1 versions prior to 16.1R3-S4, 16.1R4-S3, 16.1R5; o 16.2 versions prior to 16.2R1-S4, 16.2R2; o 17.1 versions prior to 17.1R1-S2, 17.1R2; o 17.2 versions prior to 17.2R1. Juniper SIRT is not aware of any malicious exploitation of these vulnerabilities. These issues were discovered during external security research. Important security issues resolved include: CVE CVSS Summary The do_setup_env function in session.c in sshd in OpenSSH through 7.2p2, when the UseLogin feature 7.8 ( CVSS:3.0 is enabled and PAM is configured to read CVE-2015-8325 /AV:L/AC:L/ .pam_environment files in user home directories, PR:L/UI:N/S:U/ allows local users to gain privileges by C:H/I:H/A:H ) triggering a crafted environment for the /bin/ login program, as demonstrated by an LD_PRELOAD environment variable. sshd in OpenSSH before 7.3, when SHA256 or SHA512 5.9 ( CVSS:3.0 are used for user password hashing, uses BLOWFISH /AV:N/AC:H/ hashing on a static password when the username CVE-2016-6210 PR:N/UI:N/S:U/ does not exist, which allows remote attackers to C:H/I:N/A:N ) enumerate users by leveraging the timing difference between responses when a large password is provided. The auth_password function in auth-passwd.c in 7.5 ( CVSS:3.0 sshd in OpenSSH before 7.3 does not limit CVE-2016-6515 /AV:N/AC:L/ password lengths for password authentication, PR:N/UI:N/S:U/ which allows remote attackers to cause a denial C:N/I:N/A:H ) of service (crypt CPU consumption) via a long string. Use-after-free vulnerability in the 4.8 ( CVSS:3.0 mm_answer_pam_free_ctx function in monitor.c in /AV:N/AC:H/ sshd in OpenSSH before 7.0 on non-OpenBSD CVE-2015-6564 PR:N/UI:N/S:U/ platforms might allow local users to gain C:L/I:L/A:N ) privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request. 7.3 ( CVSS:3.0 Untrusted search path vulnerability in /AV:N/AC:L/ ssh-agent.c in ssh-agent in OpenSSH before 7.4 CVE-2016-10009 PR:N/UI:N/S:U/ allows remote attackers to execute arbitrary C:L/I:L/A:L ) local PKCS#11 modules by leveraging control over a forwarded agent-socket. 7.0 ( CVSS:3.0 sshd in OpenSSH before 7.4, when privilege /AV:L/AC:H/ separation is not used, creates forwarded CVE-2016-10010 PR:L/UI:N/S:U/ Unix-domain sockets as root, which might allow C:H/I:H/A:H ) local users to gain privileges via unspecified vectors, related to serverloop.c. authfile.c in sshd in OpenSSH before 7.4 does not 5.5 ( CVSS:3.0 properly consider the effects of realloc on CVE-2016-10011 /AV:L/AC:L/ buffer contents, which might allow local users to PR:L/UI:N/S:U/ obtain sensitive private-key information by C:H/I:N/A:N ) leveraging access to a privilege-separated child process. The shared memory manager (associated with pre-authentication compression) in sshd in 7.8 ( CVSS:3.0 OpenSSH before 7.4 does not ensure that a bounds CVE-2016-10012 /AV:L/AC:L/ check is enforced by all compilers, which might PR:L/UI:N/S:U/ allows local users to gain privileges by C:H/I:H/A:H ) leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures. Solution: The following software releases have been updated to resolve this specific issue: 12.3X48-D55, 12.3R12-S13, 15.1X49-D100, 15.1F6-S12, 15.1R5-S4, 15.1R6-S1, 15.1R7, 16.1R3-S4, 16.1R4-S3, 16.1R5, 16.2R1-S4, 16.2R2, 17.1R1-S2, 17.1R2, 17.2R1 and all subsequent releases. Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL). These issues are being tracked as PR 1208815 which are visible on the Customer Support website. Workaround: There are no viable workarounds for these issues. To reduce the risk of exploitation of these issues use access lists or firewall filters to limit access to the device(s) to only trusted administrative networks, hosts and users. Implementation: Software Releases, patches and updates are available at https://www.juniper.net /support/downloads/ . Modification History: o 2019-07-10: Initial Publication Related Links: o KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process o KB16765: In which releases are vulnerabilities fixed o KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories o Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team CVSS Score: 5.9 (CVSS:3.1/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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