Vulnerability-Lookup

GHSA-8P3C-WVJ4-2GQC

Vulnerability from github – Published: 2026-07-10 00:31 – Updated: 2026-07-10 00:31

Details

When TCP proxy is engaged in a flow session, to support ALGs, Advanced Anti-Malware, ICAP or UTM, a TCP packet with specifically malformed TCP header will cause flow processing daemon (flowd) to crash and restart. This causes a complete service outage until the system has automatically recovered.

This issue affects Junos OS on MX with SPC3, and SRX Series:

23.4 versions before 23.4R2-S7,
24.2 versions before 24.2R2-S4,
24.4 versions before 24.4R2-S3,
25.2 versions before 25.2R2.

This issue does not affect releases before 23.4R1.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M

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{
  "affected": [],
  "aliases": [
    "CVE-2026-57023"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-09T22:17:07Z",
    "severity": "HIGH"
  },
  "details": "An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial of Service (DoS).\n\nWhen TCP proxy is engaged in a flow session, to support ALGs,\u00a0Advanced Anti-Malware, ICAP\u00a0or UTM, a TCP packet with specifically malformed TCP header will cause flow processing daemon (flowd) to crash and restart. This causes a complete service outage until the system has automatically recovered.\n\n\n\nThis issue affects Junos OS on MX with SPC3, and SRX Series:\u00a0\n\n\n\n  *  23.4 versions before 23.4R2-S7,\u00a0\n  *  24.2 versions before 24.2R2-S4,\u00a0\n  *  24.4 versions before 24.4R2-S3,\n  *  25.2 versions before 25.2R2.\n\n\n\n\nThis issue does not affect releases before 23.4R1.",
  "id": "GHSA-8p3c-wvj4-2gqc",
  "modified": "2026-07-10T00:31:26Z",
  "published": "2026-07-10T00:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57023"
    },
    {
      "type": "WEB",
      "url": "https://supportportal.juniper.net/JSA110083"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-57023 (GCVE-0-2026-57023)

Vulnerability from cvelistv5 – Published: 2026-07-09 21:06 – Updated: 2026-07-10 15:28

Title

Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd crash

Summary

An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial of Service (DoS). When TCP proxy is engaged in a flow session, to support ALGs, Advanced Anti-Malware, ICAP or UTM, a TCP packet with specifically malformed TCP header will cause flow processing daemon (flowd) to crash and restart. This causes a complete service outage until the system has automatically recovered. This issue affects Junos OS on MX with SPC3, and SRX Series: * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S3, * 25.2 versions before 25.2R2. This issue does not affect releases before 23.4R1.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1284 - Improper Validation of Specified Quantity in Input

Assigner

juniper

References

1 reference

URL	Tags
https://supportportal.juniper.net/JSA110083	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Juniper Networks	Junos OS	Affected: 23.4 , < 23.4R2-S7 (custom) Affected: 24.2 , < 24.2R2-S4 (custom) Affected: 24.4 , < 24.4R2-S3 (custom) Affected: 25.2 , < 25.2R2 (custom)

Date Public

2026-07-08 16:00

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
                "timestamp": "2026-07-10T15:28:39.605123Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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GHSA-8P3C-WVJ4-2GQC

CVE-2026-57023 (GCVE-0-2026-57023)

Tags

Sightings

Nomenclature