Vulnerability-Lookup

GHSA-HQ5P-JR85-6779

Vulnerability from github – Published: 2026-01-15 21:31 – Updated: 2026-01-15 21:31

Details

If an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart. This issue affects Junos OS on SRX Series:

23.2 versions from 23.2R2-S2 before 23.2R2-S5,
23.4 versions from 23.4R2-S1 before 23.4R2-S5,
24.2 versions before 24.2R2-S2,
24.4 versions before 24.4R1-S3, 24.4R2.

Earlier versions of Junos are also affected, but no fix is available.

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-2026-21917"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1286"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-15T21:16:07Z",
    "severity": "HIGH"
  },
  "details": "An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nIf an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart.\nThis issue affects Junos OS on SRX Series:\n\n\n\n  *  23.2 versions from 23.2R2-S2 before 23.2R2-S5,\u00a0\n  *  23.4 versions from 23.4R2-S1 before 23.4R2-S5,\n  *  24.2 versions before 24.2R2-S2,\n  *  24.4 versions before 24.4R1-S3, 24.4R2.\n\n\nEarlier versions of Junos are also affected, but no fix is available.",
  "id": "GHSA-hq5p-jr85-6779",
  "modified": "2026-01-15T21:31:48Z",
  "published": "2026-01-15T21:31:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21917"
    },
    {
      "type": "WEB",
      "url": "https://kb.juniper.net/JSA105996"
    },
    {
      "type": "WEB",
      "url": "https://supportportal.juniper.net/JSA105996"
    }
  ],
  "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-2026-21917 (GCVE-0-2026-21917)

Vulnerability from cvelistv5 – Published: 2026-01-15 20:27 – Updated: 2026-01-15 21:12

Title

Junos OS: SRX Series: Specifically malformed SSL packet causes FPC crash

Summary

An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart. This issue affects Junos OS on SRX Series: * 23.2 versions from 23.2R2-S2 before 23.2R2-S5, * 23.4 versions from 23.4R2-S1 before 23.4R2-S5, * 24.2 versions before 24.2R2-S2, * 24.4 versions before 24.4R1-S3, 24.4R2. Earlier versions of Junos are also affected, but no fix is available.

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

CWE

CWE-1286 - Improper Validation of Syntactic Correctness of Input

Assigner

juniper

References

URL

Tags

	https://supportportal.juniper.net/JSA105996	vendor-advisory
	https://kb.juniper.net/JSA105996	vendor-advisory

Impacted products

	Vendor	Product	Version
	Juniper Networks	Junos OS	Affected: 23.2R2-S2 , < 23.2R2-S5 (semver) Affected: 23.4R2-S1 , < 23.4R2-S5 (semver) Affected: 24.2 , < 24.2R2-S2 (semver) Affected: 24.4 , < 24.4R1-S3, 24.4R2 (semver)

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-21917",
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                "role": "CISA Coordinator",
                "timestamp": "2026-01-15T21:12:30.579909Z",
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-HQ5P-JR85-6779

CVE-2026-21917 (GCVE-0-2026-21917)

Tags

Sightings

Nomenclature