CVE-2023-28968Network attack vector

Policy bypass via JDPI-Decoder allocation exhaustion

Published Apr 17, 2023 · Updated Feb 6, 2025

Improper memory allocation in Juniper Networks Junos OS AppID on SRX Series allows remote attackers to bypass dynamic-application policy actions. The JDPI-Decoder exhausts its sequential allocation while inspecting crafted dynamic-application traffic, stops identifying flows, labels them junos:UNKNOWN, and passes them without the configured action. The condition requires JDPI-Decoder to be enabled with an affected AppID SigPack, and the resulting policy bypass permits traffic that inspection was configured to control.

CVSS severity5.3
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper memory allocation in Juniper Networks Junos OS AppID on SRX Series allows remote attackers to bypass dynamic-application policy actions. The JDPI-Decoder exhausts its sequential allocation while inspecting crafted dynamic-application traffic, stops identifying flows, labels them junos:UNKNOWN, and passes them without the configured action. The condition requires JDPI-Decoder to be enabled with an affected AppID SigPack, and the resulting policy bypass permits traffic that inspection was configured to control.

The record

CVE
CVE-2023-28968
Published
Apr 17, 2023
Updated
Feb 6, 2025
Vendor
Juniper Networks
Product
AppID Service Sigpack
Classifications
CWE-1325, T1562.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <1.550.2-31

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · AppID Service Sigpackversion=unspecified <1.550.2-31
Juniper Networks · Junos OSversion=19.2 <19.2R3-S7; version=19.3 <19.3R3-S8; version=19.4 <19.4R3-S11; version=20.1R1 <20.1*; version=20.2 <20.2R3-S7; version=20.3R1 <20.3*; version=20.4 <20.4R3-S6; version=21.1 <21.1R3-S5; version=21.2 <21.2R3-S4; version=21.3 <21.3R3-S3; version=21.4 <21.4R3-S3; version=22.1 <22.1R3-S1; version=22.2 <22.2R2-S1, 22.2R3; version=22.3 <22.3R2; version=unspecified <19.1R3-S10
Juniper Networks · JDPI-Decoderversion=unspecified <5.7.0-47

Published CVSS scores

5.3Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1325Improperly Controlled Sequential Memory Allocation
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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