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TI-2023-18625 Aliases CVE-2023-36831GHSA-g6m3-8xg2-qjhj

Junos OS: SRX Series: jbuf memory leak when SSL Proxy and UTM Web-Filtering is applied

Priority MEDIUM 40CWE-703Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

An Improper Check or Handling of Exceptional Conditions vulnerability in the UTM (Unified Threat Management) Web-Filtering feature of Juniper Networks Junos OS on SRX Series causes a jbuf memory leak to occur when accessing certain websites, eventually leading to a Denial of Service (DoS) condition. Service restoration is only possible by rebooting the system. The jbuf memory leak only occurs in SSL Proxy and UTM Web-Filtering configurations. Other products, platforms, and configurations are not affected by this vulnerability. This issue affects Juniper Networks Junos OS on SRX Series: 22.2 versions prior to 22.2R3; 22.3 versions prior to 22.3R2-S1, 22.3R3; 22.4 versions prior to 22.4R1-S2, 22.4R2. This issue does not affect Juniper Networks Junos OS versions prior to 22.2R2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00632 50th percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 22.2R3, 22.3R2-S1, 22.3R3 +2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OS22.2 to before 22.2R3; 22.3 to before 22.3R2-S1, 22.3R3; 22.4 to before 22.4R1-S2, 22.4R222.2R3, 22.3R2-S1, 22.3R3, 22.4R1-S2, 22.4R2Patch availableCNA
  • Junos OS VendorJuniper Affected 22.2 to before 22.2R3; 22.3 to before 22.3R2-S1, 22.3R3; 22.4 to before 22.4R1-S2, 22.4R2 Fixed in 22.2R3, 22.3R2-S1, 22.3R3, 22.4R1-S2, 22.4R2 Patch available CNA

CPE configurations NVD · 42

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:22.2:r1:*:*:*:*:*:*22.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:22.2:r1-s1:*:*:*:*:*:*22.2 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:22.2:r1-s2:*:*:*:*:*:*22.2 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:22.2:r2:*:*:*:*:*:*22.2 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:22.2:r2-s1:*:*:*:*:*:*22.2 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:22.2:r2-s2:*:*:*:*:*:*22.2 r2-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:22.3:r1:*:*:*:*:*:*22.3 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:22.3:r1-s1:*:*:*:*:*:*22.3 r1-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:22.3:r1-s2:*:*:*:*:*:*22.3 r1-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:22.3:r2:*:*:*:*:*:*22.3 r2VulnerableJuniper
  • cpe:2.3:o:juniper:junos:22.2:r1:*:*:*:*:*:* Versions 22.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.2:r1-s1:*:*:*:*:*:* Versions 22.2 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.2:r1-s2:*:*:*:*:*:* Versions 22.2 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.2:r2:*:*:*:*:*:* Versions 22.2 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.2:r2-s1:*:*:*:*:*:* Versions 22.2 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.2:r2-s2:*:*:*:*:*:* Versions 22.2 r2-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.3:r1:*:*:*:*:*:* Versions 22.3 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.3:r1-s1:*:*:*:*:*:* Versions 22.3 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.3:r1-s2:*:*:*:*:*:* Versions 22.3 r1-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.3:r2:*:*:*:*:*:* Versions 22.3 r2 Vulnerable ·Juniper
Show 32 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*22.4 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*22.4 r1-s1VulnerableJuniper
cpe:2.3:a:juniper:vsrx:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:csrx:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx100:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx110:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx1400:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx1500:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx210:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx220:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx240:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx240h2:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx240m:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx300:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx320:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx340:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx3400:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx345:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx3600:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx380:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx4000:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx4100:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx4200:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx4600:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx5000:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx5400:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx550:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx550_hm:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx550m:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
cpe:2.3:h:juniper:srx650:-:*:*:*:*:*:*:*not specified by NVDRunning onJuniper
  • cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:* Versions 22.4 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:* Versions 22.4 r1-s1 Vulnerable ·Juniper
  • cpe:2.3:a:juniper:vsrx:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:csrx:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx110:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx1400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx1500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx210:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx220:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx240:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx240h2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx240m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx320:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx340:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx3400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx345:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx3600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx380:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx4000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx4100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx4200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx4600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx5000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx5400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx550:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx550_hm:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx550m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper
  • cpe:2.3:h:juniper:srx650:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Juniper

Remediation

  • Fix · CNA Junos OS (Juniper Networks) Fixed in 22.2R3, 22.3R2-S1, 22.3R3, 22.4R1-S2, 22.4R2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-36831
  2. 2026-10-03 Alias added: GHSA-g6m3-8xg2-qjhj
  3. 2026-10-27 EPSS moved to the 50th–90th percentile

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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences