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2019-10 Security Bulletin: Junos OS: SRX Series: Denial of Service vulnerability in flowd due to multicast packets (CVE-2019-0068)

  [JSA10968] Show Article Properties


Product Affected:
This issue affects Junos OS 12.3X48, 15.1X49, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4, 19.1. Affected platforms: SRX Series.
Problem:
The SRX flowd process, responsible for packet forwarding, may crash and restart when processing specific multicast packets.

By continuously sending the specific multicast packets, an attacker can repeatedly crash the flowd process causing a sustained Denial of Service.

This issue affects Juniper Networks Junos OS on SRX Series:

12.3X48 versions prior to 12.3X48-D90;

15.1X49 versions prior to 15.1X49-D180;

17.3 versions;

17.4 versions prior to 17.4R2-S5, 17.4R3;

18.1 versions prior to 18.1R3-S6;

18.2 versions prior to 18.2R2-S4, 18.2R3;

18.3 versions prior to 18.3R2-S1, 18.3R3;

18.4 versions prior to 18.4R2;

19.1 versions prior to 19.1R1-S1, 19.1R2.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2019-0068.

Solution:
The following software releases have been updated to resolve this specific issue: 12.3X48-D90, 15.1X49-D180, 17.4R2-S5, 17.4R3, 18.1R3-S6, 18.2R2-S4, 18.2R3, 18.3R2-S1, 18.3R3, 18.4R2, 19.1R1-S1, 19.1R2, 19.2R1, and all subsequent releases.

This issue is being tracked as PR 1417510 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Workaround:
There are no available workarounds for this issue.
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2019-10-09: Initial Publication.
Related Links:
CVSS Score:
6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
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."