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TI-2020-01630 Aliases CVE-2020-1683GHSA-h8g9-274c-2qqg

Junos OS: Memory leak leads to kernel crash (vmcore) due to SNMP polling

Priority LOW 35CWE-401Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-401.

Summary

On Juniper Networks Junos OS devices, a specific SNMP OID poll causes a memory leak which over time leads to a kernel crash (vmcore). Prior to the kernel crash other processes might be impacted, such as failure to establish SSH connection to the device. The administrator can monitor the output of the following command to check if there is memory leak caused by this issue: user@device> show system virtual-memory | match "pfe_ipc|kmem" pfe_ipc 147 5K - 164352 16,32,64,8192 <-- increasing vm.kmem_map_free: 127246336 <-- decreasing pfe_ipc 0 0K - 18598 32,8192 vm.kmem_map_free: 134582272 This issue affects Juniper Networks Junos OS: 17.4R3; 18.1 version 18.1R3-S5 and later versions prior to 18.1R3-S10; 18.2 version 18.2R3 and later versions prior to 18.2R3-S3; 18.2X75 version 18.2X75-D420, 18.2X75-D50 and later versions prior to 18.2X75-D430, 18.2X75-D53, 18.2X75-D60; 18.3 version 18.3R3 and later versions prior to 18.3R3-S2; 18.4 version 18.4R1-S4, 18.4R2 and later versions prior to 18.4R2-S5, 18.4R3-S1; 19.1 version 19.1R2 and later versions prior to 19.1R2-S2, 19.1R3; 19.2 version 19.2R1 and later versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S5, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. This issue does not affect Juniper Networks Junos OS prior to 17.4R3.

Why it matters now

EPSS 0.01062 64th percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 19.3R2-S5, 19.3R3, 19.4R1-S3 +1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OS17.4R3; 18.1R3-S5 and later; 18.2R3 and later; 18.2X75-D420, 18.2X75-D50 and later; 18.3R3 and later; 18.4R1-S4, 18.4R2 and later; 19.1R2 and later; 19.2R1 and later; 19.3 to before 19.3R2-S5, 19.3R3; 19.4 to before 19.4R1-S3, 19.4R219.3R2-S5, 19.3R3, 19.4R1-S3, 19.4R2Patch availableCNA
  • Junos OS VendorJuniper Affected 17.4R3; 18.1R3-S5 and later; 18.2R3 and later; 18.2X75-D420, 18.2X75-D50 and later; 18.3R3 and later; 18.4R1-S4, 18.4R2 and later; 19.1R2 and later; 19.2R1 and later; 19.3 to before 19.3R2-S5, 19.3R3; 19.4 to before 19.4R1-S3, 19.4R2 Fixed in 19.3R2-S5, 19.3R3, 19.4R1-S3, 19.4R2 Patch available CNA

CPE configurations NVD · 43

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:*17.4 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.1:r3-s5:*:*:*:*:*:*18.1 r3-s5VulnerableJuniper
cpe:2.3:o:juniper:junos:18.1:r3-s6:*:*:*:*:*:*18.1 r3-s6VulnerableJuniper
cpe:2.3:o:juniper:junos:18.1:r3-s7:*:*:*:*:*:*18.1 r3-s7VulnerableJuniper
cpe:2.3:o:juniper:junos:18.1:r3-s8:*:*:*:*:*:*18.1 r3-s8VulnerableJuniper
cpe:2.3:o:juniper:junos:18.1:r3-s9:*:*:*:*:*:*18.1 r3-s9VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2:r3:*:*:*:*:*:*18.2 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2:r3-s1:*:*:*:*:*:*18.2 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2:r3-s2:*:*:*:*:*:*18.2 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2x75:-:*:*:*:*:*:*18.2x75VulnerableJuniper
  • cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:* Versions 17.4 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.1:r3-s5:*:*:*:*:*:* Versions 18.1 r3-s5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.1:r3-s6:*:*:*:*:*:* Versions 18.1 r3-s6 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.1:r3-s7:*:*:*:*:*:* Versions 18.1 r3-s7 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.1:r3-s8:*:*:*:*:*:* Versions 18.1 r3-s8 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.1:r3-s9:*:*:*:*:*:* Versions 18.1 r3-s9 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2:r3:*:*:*:*:*:* Versions 18.2 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2:r3-s1:*:*:*:*:*:* Versions 18.2 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2:r3-s2:*:*:*:*:*:* Versions 18.2 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2x75:-:*:*:*:*:*:* Versions 18.2x75 Vulnerable ·Juniper
Show 33 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:18.2x75:d12:*:*:*:*:*:*18.2x75 d12VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2x75:d20:*:*:*:*:*:*18.2x75 d20VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2x75:d30:*:*:*:*:*:*18.2x75 d30VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2x75:d40:*:*:*:*:*:*18.2x75 d40VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2x75:d411:*:*:*:*:*:*18.2x75 d411VulnerableJuniper
cpe:2.3:o:juniper:junos:18.2x75:d51:*:*:*:*:*:*18.2x75 d51VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r3:*:*:*:*:*:*18.3 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.3:r3-s1:*:*:*:*:*:*18.3 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r1-s4:*:*:*:*:*:*18.4 r1-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:*18.4 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:*18.4 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:*18.4 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:*18.4 r2-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:*18.4 r2-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:18.4:r3:*:*:*:*:*:*18.4 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:*19.1 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:*19.1 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:*19.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*19.2 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*19.2 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*19.2 r1-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:*19.2 r1-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*19.3VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:*19.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*19.3 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:*19.3 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*19.3 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*19.3 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:*19.3 r2-s3VulnerableJuniper
cpe:2.3:o:juniper:junos:19.3:r2-s4:*:*:*:*:*:*19.3 r2-s4VulnerableJuniper
cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*19.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*19.4 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*19.4 r1-s2VulnerableJuniper
  • cpe:2.3:o:juniper:junos:18.2x75:d12:*:*:*:*:*:* Versions 18.2x75 d12 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2x75:d20:*:*:*:*:*:* Versions 18.2x75 d20 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2x75:d30:*:*:*:*:*:* Versions 18.2x75 d30 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2x75:d40:*:*:*:*:*:* Versions 18.2x75 d40 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2x75:d411:*:*:*:*:*:* Versions 18.2x75 d411 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.2x75:d51:*:*:*:*:*:* Versions 18.2x75 d51 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r3:*:*:*:*:*:* Versions 18.3 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.3:r3-s1:*:*:*:*:*:* Versions 18.3 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r1-s4:*:*:*:*:*:* Versions 18.4 r1-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:* Versions 18.4 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:* Versions 18.4 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:* Versions 18.4 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:* Versions 18.4 r2-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:* Versions 18.4 r2-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:18.4:r3:*:*:*:*:*:* Versions 18.4 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:* Versions 19.1 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:* Versions 19.1 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:* Versions 19.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:* Versions 19.2 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:* Versions 19.2 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:* Versions 19.2 r1-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:* Versions 19.2 r1-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:* Versions 19.3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:* Versions 19.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:* Versions 19.3 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:* Versions 19.3 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:* Versions 19.3 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:* Versions 19.3 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:* Versions 19.3 r2-s3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.3:r2-s4:*:*:*:*:*:* Versions 19.3 r2-s4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:* Versions 19.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:* Versions 19.4 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:* Versions 19.4 r1-s2 Vulnerable ·Juniper

Remediation

  • Fix · CNA Junos OS (Juniper Networks) Fixed in 19.3R2-S5, 19.3R3, 19.4R1-S3, 19.4R2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-1683
  2. 2026-10-03 Alias added: GHSA-h8g9-274c-2qqg

References

Advisory 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
  • TI-2023-18644 Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files KEVCVSS 3.1MEDIUM 5.3
  • TI-2023-18640 Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files KEVCVSS 3.1MEDIUM 5.3
See all 792 →

Sources

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