2018-07 Security Bulletin: Junos OS: Kernel crash (vmcore) during broadcast storm after enabling 'monitor traffic interface fxp0' (CVE-2018-0029)

Product Affected

This issue affects Junos OS 15.1, 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.2X75, 17.3, 17.4.

Severity

Medium

Severity Assessment (CVSS) Score

5.7 (CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

Problem

While experiencing a broadcast storm, placing the fxp0 interface into promiscuous mode via the ' monitor traffic interface fxp0 ' can cause the system to crash and restart (vmcore).

This issue only affects Junos OS 15.1 and later releases, and affects both single core and multi-core REs. Releases prior to Junos OS 15.1 are unaffected by this vulnerability

Affected releases are Juniper Networks Junos OS:

15.1 versions prior to 15.1F6-S11, 15.1R4-S9, 15.1R6-S6, 15.1R7;
15.1X49 versions prior to 15.1X49-D140;
15.1X53 versions prior to 15.1X53-D59 on EX2300/EX3400;
15.1X53 versions prior to 15.1X53-D67 on QFX10K;
15.1X53 versions prior to 15.1X53-D233 on QFX5200/QFX5110;
15.1X53 versions prior to 15.1X53-D471, 15.1X53-D490 on NFX;
16.1 versions prior to 16.1R3-S8, 16.1R5-S4, 16.1R6-S1, 16.1R7;
16.2 versions prior to 16.2R1-S6, 16.2R2-S5, 16.2R3;
17.1 versions prior to 17.1R1-S7, 17.1R2-S7, 17.1R3;
17.2 versions prior to 17.2R1-S6, 17.2R2-S4, 17.2R3;
17.2X75 versions prior to 17.2X75-D90, 17.2X75-D110;
17.3 versions prior to 17.3R1-S4, 17.3R2;
17.4 versions prior to 17.4R1-S3, 17.4R2.

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-2018-0029 .

Solution

The following software releases have been updated to resolve this specific issue: 15.1F6-S11*, 15.1R4-S9, 15.1R6-S6, 15.1R7, 15.1X49-D140, 15.1X53-D233, 15.1X53-D471, 15.1X53-D490, 15.1X53-D59, 15.1X53-D67, 16.1R3-S8, 16.1R5-S4, 16.1R6-S1, 16.1R7, 16.2R1-S6, 16.2R2-S5, 16.2R3, 17.1R1-S7, 17.1R2-S7, 17.1R3, 17.2R1-S6, 17.2R2-S4, 17.2R3, 17.2X75-D110, 17.2X75-D90, 17.3R1-S4, 17.3R2, 17.4R1-S3, 17.4R2, 18.1R1, 18.1X75-D10, and all subsequent releases.
*Future availability

This issue is being tracked as PR 1322294 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).

Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/

Workaround

Avoid executing the 'monitor traffic interface fxp0' command while attempting to troubleshoot broadcast storms.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History