CVE-2019-0011

Junos OS: Kernel crash after processing specific incoming packet to the out of band management interface (CVE-2019-0011)

Description

The Junos OS kernel crashes after processing a specific incoming packet to the out of band management interface (such as fxp0, me0, em0, vme0) destined for another address. By continuously sending this type of packet, an attacker can repeatedly crash the kernel causing a sustained Denial of Service. Affected releases are Juniper Networks Junos OS: 17.2 versions prior to 17.2R1-S7, 17.2R3; 17.3 versions prior to 17.3R3-S3; 17.4 versions prior to 17.4R1-S4, 17.4R2; 17.2X75 versions prior to 17.2X75-D110; 18.1 versions prior to 18.1R2.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: Junos OS 17.2R1-S7, 17.2R3, 17.2X75-D110, 17.3R3-S3, 17.4R1-S4, 17.4R2, 18.1R2, 18.2R1, 18.2X75-D5, and all subsequent releases.

Workaround:

  • Apply a firewall filter on the management interface which permits only the necessary traffic on management interface to the device's local address, such as SNMP, SSH, or other management traffic and drops everything else.
6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.11%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA10911 vendor advisory
http://www.securityfocus.com/bid/106534 broken link third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2019-0011?
CVE-2019-0011 has been scored as a medium severity vulnerability.
How to fix CVE-2019-0011?
To fix CVE-2019-0011: The following software releases have been updated to resolve this specific issue: Junos OS 17.2R1-S7, 17.2R3, 17.2X75-D110, 17.3R3-S3, 17.4R1-S4, 17.4R2, 18.1R2, 18.2R1, 18.2X75-D5, and all subsequent releases.
Is CVE-2019-0011 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-0011 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-0011?
CVE-2019-0011 affects Juniper Networks Junos OS.
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