CVE-2021-0299 — Improper Handling of Exceptional Conditions in Networks Junos OS

CWE-755 — Improper Handling of Exceptional Conditions4 documents4 sources
Severity
7.5HIGHNVD
EPSS
0.4%
top 41.30%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Juniper Networks Junos OSJuniper Junos
Timeline
PublishedOct 19
Latest updateMay 24

Description

An Improper Handling of Exceptional Conditions vulnerability in the processing of a transit or directly received malformed IPv6 packet in Juniper Networks Junos OS results in a kernel crash, causing the device to restart, leading to a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects systems with IPv6 configured. Devices with only IPv4 configured are not vulnerable to this issue. This issue …

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶CVEListV5juniper_networks/junos_os19.4 — 19.4R3+2
▶NVDjuniper/junos19.4, 20.1, 20.2+2

🔴Vulnerability Details

2
GHSA
GHSA-cfcv-4r42-7465: An Improper Handling of Exceptional Conditions vulnerability in the processing of a transit or directly received malformed IPv6 packet in Juniper Netw↗2022-05-24
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CVEList
Junos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet↗2021-10-19
▶

📋Vendor Advisories

1
Juniper
CVE-2021-0299: An Improper Handling of Exceptional Conditions vulnerability in the processing of a transit or directly received malformed IPv6 packet in Juniper Netw↗2021-10-19
▶
CVE-2021-0299 — Juniper Networks Junos OS vulnerability | cvebase