Improper input validation in Juniper Junos
CVE-2021-0208
An improper input validation vulnerability in the Routing Protocol Daemon (RPD) service of Juniper Networks Junos OS allows an attacker to send a malformed RSVP packet when bidirectional LSPs are in use, which when received by an egress router crashes the RPD causing a Denial of Service (DoS) condition. Continued receipt of the packet will sustain the Denial of Service. This issue affects: Juniper Networks Junos OS: All versions prior to 17.3R3-S10 except 15.1X49-D240 for SRX series; 17.4 versions prior to 17.4R3-S2; 18.1 versions prior to 18.1R3-S10; 18.2 versions prior to 18.2R2-S7, 18.2R3-S4; 18.3 versions prior to 18.3R3-S2; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S2; 19.1 versions prior to 19.1R1-S5, 19.1R3-S3; 19.2 versions prior to 19.2R3; 19.3 versions prior to 19.3R2-S5, 19.3R3; 19.4 versions prior to 19.4R2-S2, 19.4R3-S1; 20.1 versions prior to 20.1R1-S4, 20.1R2; 15.1X49 versions prior to 15.1X49-D240 on SRX Series. Juniper Networks Junos OS Evolved: 19.3 versions prior to 19.3R2-S5-EVO; 19.4 versions prior to 19.4R2-S2-EVO; 20.1 versions prior to 20.1R1-S4-EVO.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000
Affected products
- Juniper Junos — versions 15.1x49, 17.3, 17.4
- Juniper Junos OS Evolved — versions 19.3, 19.4, 20.1
- Juniper Srx1500
- Juniper Srx300
- Juniper Srx320
- Juniper Srx340
- Juniper Srx345
- Juniper Srx380
- Juniper Srx4100
- Juniper Srx4200
Weakness classification (CWE)
References
- kb.juniper.net/JSA11098 (Vendor Advisory)
- www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statem… (Vendor Advisory)
- www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statem… (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-0208?
- CVE-2021-0208 is a high-severity vulnerability in Juniper Junos, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2021-01-15.
- How severe is CVE-2021-0208?
- High severity. CVSS v3 base score is 8.8 out of 10.