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2020-04 Security Bulletin: Junos OS: SRX Branch Series and vSRX Series: Multiple vulnerabilities in ISC BIND named.

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Article ID: JSA10994 SECURITY_ADVISORIES Last Updated: 08 Apr 2020Version: 4.0
Product Affected:
These issues affect Junos OS 12.1X46, 12.3X48, 15.1X49, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4, 19.1. Affected platforms: SRX Branch Series, vSRX Series.
Problem:

These issues are only applicable to SRX Branch Series and vSRX Series with DNS Proxy server enabled.

These issues affect:

Juniper Networks Junos OS

12.1X46 versions prior to 12.1X46-D86 on SRX Branch Series, vSRX Series;

12.3X48 versions prior to 12.3X48-D80 on SRX Branch Series, vSRX Series;

15.1X49 versions prior to 15.1X49-D180 on SRX Branch Series, vSRX Series;

17.3 versions prior to 17.3R3-S7 on SRX Branch Series, vSRX Series;

17.4 versions prior to 17.4R3 on SRX Branch Series, vSRX Series;

18.1 versions prior to 18.1R3-S9 on SRX Branch Series, vSRX Series;

18.2 versions prior to 18.2R3 on SRX Branch Series, vSRX Series;

18.3 versions prior to 18.3R2 on SRX Branch Series, vSRX Series;

18.4 versions prior to 18.4R1-S6, 18.4R2 on SRX Branch Series, vSRX Series;

19.1 versions prior to 19.1R1 on SRX Branch Series, vSRX Series.

The following minimal configuration is required:

[system services dns dns-proxy]

Juniper SIRT is not aware of any malicious exploitation of these vulnerabilities.

These issues were discovered during an external security research.

ISC BIND software included with Junos OS on SRX Branch Series and vSRX devices has been upgraded to resolve the following vulnerabilities:

CVE CVSS Summary
CVE-2016-1285 6.8 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H) named in ISC BIND 9.x before 9.9.8-P4 and 9.10.x before 9.10.3-P4 does not properly handle DNAME records when parsing fetch reply messages, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a malformed packet to the rndc (aka control channel) interface, related to alist.c and sexpr.c.
CVE-2016-1286 8.6 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H) named in ISC BIND 9.x before 9.9.8-P4 and 9.10.x before 9.10.3-P4 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted signature record for a DNAME record, related to db.c and resolver.c.

 

Solution:

The following software releases have been updated to resolve these specific issues: 12.1X46-D86, 12.3X48-D80, 15.1X49-D180, 17.3R3-S7, 17.4R3, 18.1R3-S9, 18.2R3, 18.2X75-D12, 18.2X75-D51, 18.2X75-D60, 18.3R2, 18.4R1-S6, 18.4R2, 19.1R1, and all subsequent releases.

These issues are being tracked as 1168322.

Workaround:

There are no viable workarounds for these issues.

To reduce the impact of exploitation, we suggest customers split primary and secondary DNS looksups and assignments between the local Proxy DNS service and centralized/remote DNS servers.

Modification History:
‚Äč2020-04-08: Initial publication
CVSS Score:
5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
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."

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