8.8

CVE-2021-0208: juniper networks junos os Improper Input Validation

CVSS: 8.8v3.1HighModified
Published 15-01-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-0208 is a high (CVSS 8.8) Improper Input Validation vulnerability in juniper networks junos os. EPSS estimates a 0.66% chance of exploitation in the next 30 days, higher than 50.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.66%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-01-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.66%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.01 pp

From 0.65% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.66%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Juniper2 products
  • junos15.1x49 | 15.1x49:d10 | 15.1x49:d100 | 15.1x49:d110 | 15.1x49:d120 | 15.1x49:d130 | 15.1x49:d140 | 15.1x49:d15 | 15.1x49:d150 | 15.1x49:d160 | 15.1x49:d170 | 15.1x49:d180 | 15.1x49:d190 | 15.1x49:d20 | 15.1x49:d200 | 15.1x49:d210 | 15.1x49:d25 | 15.1x49:d30 | 15.1x49:d35 | 15.1x49:d40 | 15.1x49:d45 | 15.1x49:d50 | 15.1x49:d55 | 15.1x49:d60 | 15.1x49:d65 | 15.1x49:d70 | 15.1x49:d75 | 15.1x49:d80 | 15.1x49:d90 | 17.3 | 17.3:r1-s1 | 17.3:r2 | 17.3:r2-s1 | 17.3:r2-s2 | 17.3:r2-s3 | 17.3:r2-s4 | 17.3:r2-s5 | 17.3:r3 | 17.3:r3-s1 | 17.3:r3-s2 | 17.3:r3-s3 | 17.3:r3-s4 | 17.3:r3-s7 | 17.3:r3-s8 | 17.3:r3-s9 | 17.4 | 17.4:r1 | 17.4:r1-s1 | 17.4:r1-s2 | 17.4:r1-s4 | 17.4:r1-s5 | 17.4:r1-s6 | 17.4:r1-s7 | 17.4:r2 | 17.4:r2-s1 | 17.4:r2-s10 | 17.4:r2-s11 | 17.4:r2-s2 | 17.4:r2-s3 | 17.4:r2-s4 | 17.4:r2-s5 | 17.4:r2-s6 | 17.4:r2-s7 | 17.4:r2-s8 | 17.4:r2-s9 | 17.4:r3 | 17.4:r3-s1 | 18.1 | 18.1:r1 | 18.1:r2 | 18.1:r2-s1 | 18.1:r2-s2 | 18.1:r2-s4 | 18.1:r3 | 18.1:r3-s1 | 18.1:r3-s2 | 18.1:r3-s3 | 18.1:r3-s4 | 18.1:r3-s6 | 18.1:r3-s7 | 18.1:r3-s8 | 18.1:r3-s9 | 18.2 | 18.2:r1 | 18.2:r1-s3 | 18.2:r1-s4 | 18.2:r1-s5 | 18.2:r2 | 18.2:r2-s1 | 18.2:r2-s2 | 18.2:r2-s3 | 18.2:r2-s4 | 18.2:r2-s5 | 18.2:r2-s6 | 18.2:r3 | 18.2:r3-s1 | 18.2:r3-s2 | 18.2:r3-s3 | 18.3 | 18.3:r1 | 18.3:r1-s1 | 18.3:r1-s2 | 18.3:r1-s3 | 18.3:r1-s5 | 18.3:r1-s6 | 18.3:r2 | 18.3:r2-s1 | 18.3:r2-s2 | 18.3:r2-s3 | 18.3:r2-s4 | 18.3:r3 | 18.3:r3-s1 | 18.4 | 18.4:r1 | 18.4:r1-s1 | 18.4:r1-s2 | 18.4:r1-s3 | 18.4:r1-s4 | 18.4:r1-s5 | 18.4:r1-s6 | 18.4:r1-s7 | 18.4:r2 | 18.4:r2-s1 | 18.4:r2-s2 | 18.4:r2-s3 | 18.4:r2-s4 | 18.4:r2-s5 | 18.4:r3 | 18.4:r3-s1 | 19.1 | 19.1:r1 | 19.1:r1-s1 | 19.1:r1-s2 | 19.1:r1-s3 | 19.1:r1-s4 | 19.1:r3 | 19.1:r3-s1 | 19.1:r3-s2 | 19.2 | 19.2:r1 | 19.2:r1-s1 | 19.2:r1-s2 | 19.2:r1-s3 | 19.2:r1-s4 | 19.2:r2 | 19.3 | 19.3:r1 | 19.3:r1-s1 | 19.3:r2 | 19.3:r2-s1 | 19.3:r2-s2 | 19.3:r2-s3 | 19.3:r2-s4 | 19.4:r1 | 19.4:r1-s1 | 19.4:r1-s2 | 19.4:r2 | 19.4:r2-s1 | 19.4:r3 | 20.1:r1 | 20.1:r1-s1 | 20.1:r1-s2 | 20.1:r1-s3
  • junos_os_evolved19.3:r1 | 19.3:r2 | 19.4:r1 | 19.4:r2 | 19.4:r2-s1 | 20.1 | 20.1:r1 | 20.1:r1-s1
Juniper networks2 products
  • junos os≥ unspecified, < 17.3R3-S10 | ≥ 17.4, < 17.4R3-S2 | ≥ 18.1, < 18.1R3-S10 | ≥ 18.2, < 18.2R2-S7, 18.2R3-S4 | ≥ 18.3, < 18.3R3-S2 | ≥ 18.4, < 18.4R1-S8, 18.4R2-S6, 18.4R3-S2 | ≥ 19.1, < 19.1R1-S5, 19.1R3-S3 | ≥ 19.2, < 19.2R3 | ≥ 19.3, < 19.3R2-S5, 19.3R3 | ≥ 19.4, < 19.4R2-S2, 19.4R3-S1 | ≥ 20.1, < 20.1R1-S4, 20.1R2 | ≥ 15.1X49, < 15.1X49-D240
  • junos os evolved≥ 19.3, < 19.3R2-S5-EVO | ≥ 19.4, < 19.4R2-S2-EVO | ≥ 20.1, < 20.1R1-S4-EVO

2 vendors · 4 products

References

3 links