CVE-2020-1656 (GCVE-0-2020-1656)

Vulnerability from cvelistv5 – Published: 2020-10-16 20:31 – Updated: 2024-09-17 04:14
VLAI?
Title
Junos OS: When a DHCPv6 Relay-Agent is configured upon receipt of a specific DHCPv6 client message, Remote Code Execution may occur.
Summary
The DHCPv6 Relay-Agent service, part of the Juniper Enhanced jdhcpd daemon shipped with Juniper Networks Junos OS has an Improper Input Validation vulnerability which will result in a Denial of Service (DoS) condition when a DHCPv6 client sends a specific DHPCv6 message allowing an attacker to potentially perform a Remote Code Execution (RCE) attack on the target device. Continuous receipt of the specific DHCPv6 client message will result in an extended Denial of Service (DoS) condition. If adjacent devices are also configured to relay DHCP packets, and are not affected by this issue and simply transparently forward unprocessed client DHCPv6 messages, then the attack vector can be a Network-based attack, instead of an Adjacent-device attack. No other DHCP services are affected. Receipt of the packet without configuration of the DHCPv6 Relay-Agent service, will not result in exploitability of this issue. This issue affects Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D95; 14.1X53 versions prior to 14.1X53-D53; 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D200; 15.1X53 versions prior to 15.1X53-D593; 16.1 versions prior to 16.1R7-S7; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S2; 17.2 versions prior to 17.2R3-S3; 17.2X75 versions prior to 17.2X75-D44; 17.3 versions prior to 17.3R3-S7; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S9; 18.2 versions prior to 18.2R2-S6, 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D12, 18.2X75-D33, 18.2X75-D435, 18.2X75-D60; 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3-S1; 18.4 versions prior to 18.4R1-S5, 18.4R2-S3, 18.4R3; 19.1 versions prior to 19.1R1-S4, 19.1R2; 19.2 versions prior to 19.2R1-S3, 19.2R2; 19.3 versions prior to 19.3R2.
Severity ?
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • Denial of Service (DoS)
  • Remote Code Execution
  • CWE-476 - NULL Pointer Dereference
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Affected: 12.3 , < 12.3R12-S15 (custom)
Affected: 12.3X48 , < 12.3X48-D95 (custom)
Affected: 14.1X53 , < 14.1X53-D53 (custom)
Affected: 15.1 , < 15.1R7-S6 (custom)
Affected: 15.1X49 , < 15.1X49-D200 (custom)
Affected: 15.1X53 , < 15.1X53-D593 (custom)
Affected: 16.1 , < 16.1R7-S7 (custom)
Affected: 16.2 , < 16.2R2-S11 (custom)
Affected: 17.1 , < 17.1R2-S11, 17.1R3-S2 (custom)
Affected: 17.2 , < 17.2R3-S3 (custom)
Affected: 17.2X75 , < 17.2X75-D44 (custom)
Affected: 17.3 , < 17.3R3-S7 (custom)
Affected: 17.4 , < 17.4R2-S9, 17.4R3 (custom)
Affected: 18.1 , < 18.1R3-S9 (custom)
Affected: 18.2 , < 18.2R2-S6, 18.2R3-S2 (custom)
Affected: 18.2X75 , < 18.2X75-D12, 18.2X75-D33, 18.2X75-D435, 18.2X75-D60 (custom)
Affected: 18.3 , < 18.3R1-S7, 18.3R2-S3, 18.3R3-S1 (custom)
Affected: 18.4 , < 18.4R1-S5, 18.4R2-S3, 18.4R3 (custom)
Affected: 19.1 , < 19.1R1-S4, 19.1R2 (custom)
Affected: 19.2 , < 19.2R1-S3, 19.2R2 (custom)
Affected: 19.3 , < 19.3R2 (custom)
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                  "lang": "eng",
                  "value": "Denial of Service (DoS)"
                }
              ]
            },
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Remote Code Execution"
                }
              ]
            },
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-476 NULL Pointer Dereference"
                }
              ]
            },
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-20 Improper Input Validation"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://kb.juniper.net/JSA11049",
              "refsource": "CONFIRM",
              "url": "https://kb.juniper.net/JSA11049"
            },
            {
              "name": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/dhcpv6-relay-agent-overview.html",
              "refsource": "MISC",
              "url": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/dhcpv6-relay-agent-overview.html"
            },
            {
              "name": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/dhcp-relay-agent-security-devices.html",
              "refsource": "MISC",
              "url": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/dhcp-relay-agent-security-devices.html"
            },
            {
              "name": "https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-dhcpv6-relay-statistics.html",
              "refsource": "MISC",
              "url": "https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-dhcpv6-relay-statistics.html"
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "The following software releases have been updated to resolve this specific issue: Junos OS 12.3R12-S15, 12.3X48-D100, 12.3X48-D95, 14.1X53-D53, 15.1R7-S6, 15.1X49-D200, 15.1X53-D593, 16.1R7-S7, 16.2R2-S11, 17.1R2-S11, 17.1R3-S2, 17.2R3-S3, 17.2X75-D44, 17.3R3-S7, 17.4R2-S9, 17.4R3, 18.1R3-S9, 18.2R2-S6, 18.2R3-S2, 18.2X75-D12, 18.2X75-D33, 18.2X75-D435, 18.2X75-D60, 18.3R1-S7, 18.3R2-S3, 18.3R3-S1, 18.4R1-S5, 18.4R2-S3, 18.4R3, 19.1R1-S4, 19.1R2, 19.1R3, 19.2R1-S3, 19.2R2, 19.4R1, and all subsequent releases."
          }
        ],
        "source": {
          "advisory": "JSA11049",
          "defect": [
            "1461448"
          ],
          "discovery": "USER"
        },
        "work_around": [
          {
            "lang": "en",
            "value": "There are no available workarounds for this issue."
          }
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2020-1656",
    "datePublished": "2020-10-16T20:31:25.004Z",
    "dateReserved": "2019-11-04T00:00:00.000Z",
    "dateUpdated": "2024-09-17T04:14:33.289Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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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.