QID 43826

Date Published: 2021-04-19

QID 43826: Juniper Junos OS:MX Series Denial of Service (DNS Filtering)vulnerability(JSA11054)

Juniper Junos is the network operating system used in Juniper Networks hardware systems.

Affected releases are Junos OS:
17.3 versions prior to 17.3R3-S8.
18.3 versions prior to 18.3R3-S1.
18.4 versions prior to 18.4R3.
19.1 versions prior to 19.1R3.
19.2 versions prior to 19.2R2.
19.3 versions prior to 19.3R3.

QID detection logic: (Authenticated)
It checks for vulnerable Junos OS version. NOTE: The following minimal configuration is required to potentially hit this issue: services web-filter profile profile-name dns-filter-template template-name

This vulnerability might allow an attacker to cause an extended Denial of Service (DoS) attack against the device and to cause clients to be vulnerable to DNS based attacks by malicious DNS servers when they send DNS requests through the device.

CVSS V3 rated as Critical - 9.9 severity.

CVSS V2 rated as High - 6.8 severity.

Solution

The vendor has released fixes.
For more information please visit JSA11054.

Vendor References

JSA11054 - kb.juniper.net/InfoCenter/index?page=content&id=JSA11054

CVEs related to QID 43826

CVE-2020-1660 |

Software Advisories

Advisory ID	Software	Component	Link
JSA11054			kb.juniper.net/InfoCenter/index?page=content&id=JSA11054

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