Vulnerability-Lookup

FKIE_CVE-2026-97863

Vulnerability from fkie_nvd - Published: 2026-09-25 09:17 - Updated: 2026-09-25 14:31

Severity

6.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

Summary

The cisco_firesight_manager_ACL_rule_export module in misp-modules generates a shell script (.sh) that authenticates to and calls the Cisco fireSIGHT Manager API. The module interpolates configuration values (IP address, login, password, domain ID, policy ID) and MISP attribute values (destination IPs, URLs, event info comments) directly into single-quoted shell string assignments without any escaping or sanitization. Because the values are placed inside single-quoted shell strings, any value containing a single-quote character (e.g., a crafted ip-dst or url attribute value submitted to MISP) breaks out of the quoting context, allowing an attacker to inject arbitrary shell commands into the exported script. A security analyst who subsequently executes the generated .sh file unmodified would run the injected commands with their own privileges, potentially exposing fireSIGHT Manager credentials, modifying ACL rules, or compromising the analyst workstation. Additionally, the module contained a secondary defect where the variable 'config' was only assigned inside a conditional block but referenced unconditionally afterward, causing a NameError (denial of service) when the request payload lacked a 'config' key. The vulnerability requires the attacker to have the ability to submit MISP events or attributes containing a single-quote character and the victim to execute the exported script. No authentication bypass is required beyond standard MISP event-submission privileges.

References

	URL	Tags
	5a6e4751-2f3f-4070-9419-94fb35b644e8	https://github.com/misp/misp-modules/commit/625b54908efbd6acc8343aa3370d401dd370e748

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/MISP/misp-modules",
          "defaultStatus": "unaffected",
          "modules": [
            "cisco_firesight_manager_ACL_rule_export"
          ],
          "product": "misp-modules",
          "programFiles": [
            "misp_modules/modules/export_mod/cisco_firesight_manager_ACL_rule_export.py"
          ],
          "repo": "https://github.com/misp/misp-modules",
          "vendor": "misp",
          "versions": [
            {
              "lessThanOrEqual": "3.0.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The cisco_firesight_manager_ACL_rule_export module in misp-modules generates a shell script (.sh) that authenticates to and calls the Cisco fireSIGHT Manager API. The module interpolates configuration values (IP address, login, password, domain ID, policy ID) and MISP attribute values (destination IPs, URLs, event info comments) directly into single-quoted shell string assignments without any escaping or sanitization. Because the values are placed inside single-quoted shell strings, any value containing a single-quote character (e.g., a crafted ip-dst or url attribute value submitted to MISP) breaks out of the quoting context, allowing an attacker to inject arbitrary shell commands into the exported script. A security analyst who subsequently executes the generated .sh file unmodified would run the injected commands with their own privileges, potentially exposing fireSIGHT Manager credentials, modifying ACL rules, or compromising the analyst workstation. Additionally, the module contained a secondary defect where the variable \u0027config\u0027 was only assigned inside a conditional block but referenced unconditionally afterward, causing a NameError (denial of service) when the request payload lacked a \u0027config\u0027 key. The vulnerability requires the attacker to have the ability to submit MISP events or attributes containing a single-quote character and the victim to execute the exported script. No authentication bypass is required beyond standard MISP event-submission privileges."
    }
  ],
  "id": "CVE-2026-97863",
  "lastModified": "2026-09-25T14:31:45.000",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
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  "vulnStatus": "Deferred",
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      "type": "Secondary"
    }
  ]
}

CVE-2026-97863 (GCVE-0-2026-97863)

Vulnerability from cvelistv5 – Published: 2026-09-25 08:03 – Updated: 2026-09-25 13:19

Title

misp-modules: Shell Command Injection in MISP cisco_firesight_manager_ACL_rule_export Module via Unescaped Attribute Values

Summary

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-25 13:18 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in a Command ("Command Injection")

Assigner

CIRCL ENISA root

References

1 reference

URL	Tags
https://github.com/misp/misp-modules/commit/625b5…	patch

Impacted products

1 product

Vendor	Product	Version
misp	misp-modules	Affected: 0 , ≤ 3.0.10 (semver)

Credits

elhoim Claude Opus 5

GCVE extensions

AI-generated Not human-reviewed Confidence: high Model qwen3.8:27b advisory bcp-05-x-01bcp-05-x-02

AI involvement GCVE-BCP-05-X-01

Whole record AI-generated Not human-reviewed GNA-1

Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.

ai-computer-assisted:llm-generatedai-computer-assisted:classification

Model	Source	Identifier
qwen3.8:27b	ollama	`qwen3.8:27b`

Patch provenance GCVE-BCP-05-X-02

Generator: patch2vuln.py on 2026-09-25 07:48
Model: qwen3.8:27b
Input: https://github.com/elhoim/misp-modules/commit/625b54908efbd6acc8343aa3370d401dd370e748.patch 9c34349775d0…
Confidence: high

Commit	Subject	Patch SHA-256
`625b54908efb`	fix: [cisco_firesight_manager_ACL_rule_export] shell-escape	`9c34349775d0…`

Fix summary

All user-controlled and configuration values interpolated into the generated shell script are now passed through Python's shlex.quote() function, which produces a safely quoted string that cannot be broken out of by embedded shell metacharacters. For the JSON access-rule block that embeds multiple attribute values within a single shell assignment, the JSON content is first assembled as plain text and then the entire assembled string is shlex-quoted once, preventing stray quote characters from corrupting the outer quoting. The 'config' variable is now initialized to an empty dictionary before the conditional assignment, eliminating the NameError.

Patch summary

Added 'import shlex' at the top of the module. Replaced direct .format() interpolation of config values (fmc_ip_addr, fmc_login, fmc_pass, domain_id, acpolicy_id) with shlex.quote()-wrapped values. Refactored the BLOCK_JSON_TMPL to separate the JSON content template (BLOCK_JSON_CONTENT_TMPL) from the shell assignment template; the JSON content is formatted first with raw attribute values, then the resulting string is passed through shlex.quote() before being substituted into the shell assignment. Initialized 'config = {}' before the 'if "config" in request:' block to prevent NameError.

CVSS rationale

AV:N: The attacker submits crafted MISP attribute values over the network to a MISP instance. AC:L: Injecting a single-quote character into an attribute value is trivial and requires no race conditions or special timing. AT:N: No special data manipulation or prior access to the target system is needed beyond submitting an event. PR:L: The attacker needs only basic MISP user privileges to create or modify events/attributes. UI:A: The victim analyst must actively execute the generated .sh file for the injected commands to run. VC:N, VI:N, VA:N: The MISP instance itself is not directly compromised; the impact is on the downstream system where the script executes. SC:H: The injected commands can exfiltrate fireSIGHT Manager credentials and analyst system data. SI:H: Arbitrary command execution allows modification of ACL rules, system files, or other integrity-critical resources. SA:H: Injected commands can disrupt or destroy the analyst workstation or fireSIGHT Manager availability.

Weakness rationale

CWE-78 The module constructs a shell script by interpolating untrusted values (MISP attribute values, configuration fields) into single-quoted shell strings without escaping. A single-quote character in any interpolated value breaks the quoting and allows arbitrary shell command injection. This is a textbook command injection via insufficient output encoding in a generated shell script.

Attack pattern rationale

CAPEC-88 The attack pattern involves an attacker supplying input containing shell metacharacters (specifically a single quote) that is incorporated into a shell command or script without proper sanitization, resulting in execution of attacker-controlled commands. The patch confirms the vulnerable pattern: values are interpolated into single-quoted shell assignments, and the fix is to apply shlex.quote() to neutralize shell metacharacters. This is the closest and most specific CAPEC mapping for the observed vulnerability.

Assumptions to verify

The CVSS UI metric is set to A (Active) because the victim analyst must deliberately execute the generated .sh file; CVSS v4.0 does not use the v3.x 'R' value.
PR is set to L assuming the attacker holds a basic MISP user role sufficient to create or modify events and attributes; the patch does not specify exact role requirements.
SC, SI, SA are rated H based on the potential for arbitrary command execution on the analyst workstation and the fireSIGHT Manager; actual impact depends on the analyst's local privileges and the fireSIGHT Manager's exposure.
The CAPEC-88 mapping is the closest available pattern; the vulnerability is specifically an output-encoding failure in generated shell script rather than direct command-line injection, but CAPEC-88 is the narrowest defensible match.
No specific affected or fixed version numbers are available from the patch metadata; the commit date (2026-08-31) is the only temporal anchor.
The secondary NameError bug (config variable) is a minor denial-of-service issue included in the same patch but is not the primary security concern.

Model comparison

Selected qwen3.8:27b by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.

Model	Score	Agreement	Confidence	Assumptions
`qwen3.8:27b`	5	9	high	6

Show details on NVD website

JSON

To clipboard

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                },
                "patchSha256": "9c34349775d058188a7b9a4d44ff873fd285faf0ddda00b46aadbaa72f3b4e6e",
                "patchSummary": "Added \u0027import shlex\u0027 at the top of the module. Replaced direct .format() interpolation of config values (fmc_ip_addr, fmc_login, fmc_pass, domain_id, acpolicy_id) with shlex.quote()-wrapped values. Refactored the BLOCK_JSON_TMPL to separate the JSON content template (BLOCK_JSON_CONTENT_TMPL) from the shell assignment template; the JSON content is formatted first with raw attribute values, then the resulting string is passed through shlex.quote() before being substituted into the shell assignment. Initialized \u0027config = {}\u0027 before the \u0027if \"config\" in request:\u0027 block to prevent NameError.",
                "patchTruncated": false,
                "patches": [
                  {
                    "commit": "625b54908efbd6acc8343aa3370d401dd370e748",
                    "patchSha256": "9c34349775d058188a7b9a4d44ff873fd285faf0ddda00b46aadbaa72f3b4e6e",
                    "source": "https://github.com/elhoim/misp-modules/commit/625b54908efbd6acc8343aa3370d401dd370e748.patch",
                    "sourceUrl": "https://github.com/elhoim/misp-modules/commit/625b54908efbd6acc8343aa3370d401dd370e748.patch",
                    "subject": "fix: [cisco_firesight_manager_ACL_rule_export] shell-escape"
                  }
                ],
                "source": "https://github.com/elhoim/misp-modules/commit/625b54908efbd6acc8343aa3370d401dd370e748.patch",
                "subject": "fix: [cisco_firesight_manager_ACL_rule_export] shell-escape",
                "weaknessRationale": [
                  {
                    "cweId": "CWE-78",
                    "rationale": "The module constructs a shell script by interpolating untrusted values (MISP attribute values, configuration fields) into single-quoted shell strings without escaping. A single-quote character in any interpolated value breaks the quoting and allows arbitrary shell command injection. This is a textbook command injection via insufficient output encoding in a generated shell script."
                  }
                ]
              }
            }
          },
          "recordType": "advisory",
          "vulnId": "gcve-1-2026-20190"
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-97863",
    "datePublished": "2026-09-25T08:03:24.441Z",
    "dateReserved": "2026-09-25T08:02:32.714Z",
    "dateUpdated": "2026-09-25T13:19:52.508Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-97863

CVE-2026-97863 (GCVE-0-2026-97863)

Fix summary

Patch summary

CVSS rationale

Weakness rationale

Attack pattern rationale

Assumptions to verify

Model comparison

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Sightings

Nomenclature

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