Vulnerability in Juniper Junos
CVE-2020-1639
When an attacker sends a specific crafted Ethernet Operation, Administration, and Maintenance (Ethernet OAM) packet to a target device, it may improperly handle the incoming malformed data and fail to sanitize this incoming data resulting in an overflow condition. This overflow condition in Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) condition by coring the CFM daemon. Continued receipt of these packets may cause an extended Denial of Service condition. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D95 on SRX Series; 14.1X50 versions prior to 14.1X50-D145; 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R2; 15.1X49 versions prior to 15.1X49-D170 on SRX Series; 15.1X53 versions prior to 15.1X53-D67.
EPSS: 0.011 (62.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Juniper Junos — versions 12.3, 12.3x48, 14.1x50
- Juniper Networks Junos Os — versions 12.3, 14.1X50, 14.1X53
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sirt@juniper.net (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-1639?
- CVE-2020-1639 is a high-severity vulnerability in Juniper Junos, classified under CWE-703. CVSS score: 7.5/10. Published 2020-04-08.
- How severe is CVE-2020-1639?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-1639 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.