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Vulnerability · Published Oct 16, 2020 · Assigned by juniper

CVE-2020-1686Junos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet.

High 7.5

In plain English

A high-severity double free in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.4%top 27.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

On Juniper Networks Junos OS devices, receipt of a malformed IPv6 packet may cause the system to crash and restart (vmcore). This issue can be trigged by a malformed IPv6 packet destined to the Routing Engine. An attacker can repeatedly send the offending packet resulting in an extended Denial of Service condition. Only IPv6 packets can trigger this issue. IPv4 packets cannot trigger this issue. This issue affects Juniper Networks Junos OS 18.4 versions prior to 18.4R2-S4, 18.4R3-S1; 19.1 versions prior to 19.1R2-S1, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. This issue does not affect Juniper Networks Junos OS prior to 18.4R1.

Affected products (as reported)

VendorProductVersions
Juniper Networks Junos OS 18.4 – before 18.4R2-S4, 18.4R3-S119.1 – before 19.1R2-S1, 19.1R319.2 – before 19.2R1-S5, 19.2R219.3 – before 19.3R2-S4, 19.3R319.4 – before 19.4R1-S3, 19.4R2

Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References