CVE-2023-36831 (GCVE-0-2023-36831)

Vulnerability from cvelistv5 – Published: 2023-07-14 14:56 – Updated: 2024-11-07 14:41
VLAI
Title
Junos OS: SRX Series: jbuf memory leak when SSL Proxy and UTM Web-Filtering is applied
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-07 14:39 UTC
CWE
  • CWE-703 - Improper Check or Handling of Exceptional Conditions
  • Denial of Service (DoS)
Assigner
References
Impacted products
Vendor Product Version CPE status
Juniper Networks Junos OS Affected: 22.2 , < 22.2R3 (custom)
Affected: 22.3 , < 22.3R2-S1, 22.3R3 (custom)
Affected: 22.4 , < 22.4R1-S2, 22.4R2 (custom)
Unaffected: unspecified , < 22.2R2 (custom)
guessed Create a notification for this product.
juniper_networks junos_os Affected: 22.2 , < 22.2R3 (custom)
Affected: 22.3 , < 22.3R2-S1 (custom)
Affected: 22.3 , < 22.3R3 (custom)
Affected: 22.4 , < 22.4R1-S2 (custom)
Affected: 22.4 , < 22.4R2 (custom)
Affected: 0 , < 22.2R2 (custom)
    cpe:2.3:a:juniper_networks:junos_os:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2023-07-12 16:00
Show details on NVD website
To clipboard 

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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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.\n\nThe jbuf memory leak only occurs in SSL Proxy and UTM Web-Filtering configurations.  Other products, platforms, and configurations are not affected by this vulnerability.\n\nThis issue affects Juniper Networks Junos OS on SRX Series:\n22.2 versions prior to 22.2R3;\n22.3 versions prior to 22.3R2-S1, 22.3R3;\n22.4 versions prior to 22.4R1-S2, 22.4R2.\n\nThis issue does not affect Juniper Networks Junos OS versions prior to 22.2R2.\n"
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        ],
        "id": "CVE-2023-36831",
        "lastModified": "2026-06-17T06:07:10.310",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
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              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "sirt@juniper.net",
              "type": "Secondary"
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                "options": [
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                "role": "CISA Coordinator",
                "timestamp": "2024-11-07T14:39:03.046485Z",
                "version": "2.0.3"
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        },
        "published": "2023-07-14T15:15:08.913",
        "references": [
          {
            "source": "sirt@juniper.net",
            "tags": [
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            "url": "https://supportportal.juniper.net/JSA71636"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
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            "url": "https://supportportal.juniper.net/JSA71636"
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        "sourceIdentifier": "sirt@juniper.net",
        "vulnStatus": "Modified",
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                "value": "CWE-703"
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            "source": "sirt@juniper.net",
            "type": "Secondary"
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      "cve": "CVE-2023-36831",
      "id": "CVE-2023-36831",
      "initial_release_date": "2023-07-12T16:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Junos OS: SRX Series: jbuf memory leak when SSL Proxy and UTM Web-Filtering is applied",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-36831.json",
      "version": "3"
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                  "value": "The following sample configuration options highlight the features required to be affected by this issue:\u003cbr\u003e\u003ctt\u003e\u0026nbsp; set services ssl proxy profile SSL-PROXY protocol-version tls12-and-lower\u003cbr\u003e\u0026nbsp; set services ssl proxy profile SSL-PROXY trusted-ca all\u003cbr\u003e\u0026nbsp; set services ssl proxy profile SSL-PROXY root-ca ssl-proxy-ecdsa1\u003cbr\u003e\u0026nbsp; set security pki ca-profile SECURITY-CA-GROUP_1 ca-identity SECURITY-CA-GROUP_1\u003cbr\u003e\u003c/tt\u003e...\u003cbr\u003e\u003ctt\u003e\u0026nbsp; set security utm default-configuration web-filtering juniper-enhanced default log-and-permit\u003cbr\u003e\u0026nbsp; set security utm feature-profile web-filtering juniper-enhanced profile 2 category ... action block\u003cbr\u003e\u003c/tt\u003e...\u003cbr\u003e\u003ctt\u003e\u0026nbsp; set security utm utm-policy 1 web-filtering http-profile 2\u003cbr\u003e\u003c/tt\u003e...\u003cbr\u003e\u003ctt\u003e\u0026nbsp; set security policies from-zone private to-zone internet policy 1 then permit application-services ssl-proxy profile-name SSL-PROXY\u003cbr\u003e\u0026nbsp; set security policies from-zone private to-zone internet policy 1 then permit application-services utm-policy 1\u003c/tt\u003e\u003cbr\u003e"
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}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.