CVE-2023-36831

highpriority · track · 0EPSS 0.006 · 50 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.63% (50th) EPSS

CVSS 7.5 · high

Is it mine?

24 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · sirt@juniper.net USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-703USCWE-703US

affected products (24)

Products and version ranges known to be affected.

Juniper JUNOSall versionscert_bundDEcpe:/o:juniper:junos:-
Juniper JUNOS Contrail Cloudall versionscert_bundDEcpe:/o:juniper:junos:contrail_cloud
Juniper JUNOS Evolvedall versionscert_bundDEcpe:/o:juniper:junos:evolved
Juniper JUNOS PTX10001-36MRall versionscert_bundDEcpe:/o:juniper:junos:ptx10001-36mr
Juniper JUNOS PTX10004all versionscert_bundDEcpe:/o:juniper:junos:ptx10004
Juniper JUNOS PTX10008all versionscert_bundDEcpe:/o:juniper:junos:ptx10008
Juniper JUNOS PTX10016all versionscert_bundDEcpe:/o:juniper:junos:ptx10016
Juniper JUNOS Spaceall versionscert_bundDEcpe:/o:juniper:junos:space
Juniper MX Seriesall versionscert_bundDEcpe:/h:juniper:mx:-
Juniper QFX Series QFX10000all versionscert_bundDEcpe:/h:juniper:qfx:qfx10000
Juniper SRX Seriesall versionscert_bundDEcpe:/h:juniper:srx_service_gateways:-
Juniper SRX Series 4600all versionscert_bundDEcpe:/h:juniper:srx_service_gateways:4600
Juniper SRX Series 5000all versionscert_bundDEcpe:/h:juniper:srx_service_gateways:5000
Juniper Networks Junos OS22.2 → 22.2R3enisa_euvdEU
Juniper Networks Junos OS22.3 → 22.3R2-S1, 22.3R3enisa_euvdEU
Juniper Networks Junos OS22.4 → 22.4R1-S2, 22.4R2enisa_euvdEU
Juniper Networks Inc. JunOS22.2 → 22.2R3fstec_bduRU
Juniper Networks Inc. JunOS22.3 → 22.3R3fstec_bduRU
Juniper Networks Inc. JunOS22.3 → 22.3R2-S1fstec_bduRU
Juniper Networks Inc. JunOS22.4 → 22.4R1-S2fstec_bduRU

showing 20 of 24

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1737Juniper Patchday Juli 2023Deutsch2023-07-12csaf · cert_bundDE
Ein Angreifer aus dem angrenzenden Netzwerk oder ein entfernter anonymer oder lokaler Angreifer kann mehrere Schwachstellen in verschiedenen Juniper Produkten ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen und seine Privilegien zu erweitern.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2023-07-14modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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