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JuniperVULNRICHMENT:CVE-2024-39531

HistoryJul 11, 2024 - 4:04 p.m.

CVE-2024-39531 Junos OS Evolved: ACX 7000 Series: Protocol specific DDoS configuration affects other protocols

2024-07-1116:04:46

CWE-229

juniper

github.com

juniper networks

junos os

evolved

acx 7000 series

protocol specific

ddos configuration

improper handling of values

packet forwarding engine

pfe

denial-of-service

dos

vulnerability

unauthenticated attacker

network-based

bandwidth

burst

queue

ospf

isis

limitations

versions

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

CVSS4

8.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

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

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

17.3%

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

JSON

An Improper Handling of Values vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX 7000 Series allows a network-based, unauthenticated attacker to cause a Denial-of-Service (DoS).

If a value is configured for DDoS bandwidth or burst parameters for any protocol in
a queue, all protocols which share the same queue will have
their bandwidth or burst value changed to the new value. If, for example, OSPF was configured with a certain bandwidth value, ISIS would also be limited to this value. So inadvertently either the control plane is open for a high level of specific traffic which was supposed to be limited to a lower value, or the limit for a certain protocol is so low that chances to succeed with a volumetric DoS attack are significantly increased.

This issue affects Junos OS Evolved on ACX 7000 Series:

All versions before 21.4R3-S7-EVO,
22.1 versions before 22.1R3-S6-EVO,
22.2 versions before 22.2R3-S3-EVO,
22.3 versions before 22.3R3-S3-EVO,
22.4 versions before 22.4R3-S2-EVO,
23.2 versions before 23.2R2-EVO,
23.4

versions

before 23.4R1-S1-EVO, 23.4R2-EVO.

CNA Affected

[
  {
    "vendor": "Juniper Networks",
    "product": "Junos OS Evolved",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "21.4R3-S7-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.1",
        "lessThan": "22.1R3-S6-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.2",
        "lessThan": "22.2R3-S3-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.3",
        "lessThan": "22.3R3-S3-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.4",
        "lessThan": "22.4R3-S2-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "23.2",
        "lessThan": "23.2R2-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "23.4",
        "lessThan": "23.4R1-S1-EVO, 23.4R2-EVO",
        "versionType": "semver"
      }
    ],
    "platforms": [
      "ACX 7000 Series"
    ],
    "defaultStatus": "unaffected"
  }
]

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*"
    ],
    "vendor": "juniper",
    "product": "junos_os_evolved",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "21.4R3-S7-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.1",
        "lessThan": "22.1R3-S6-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.2",
        "lessThan": "22.2R3-S3-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.3",
        "lessThan": "22.3R3-S3-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "22.4",
        "lessThan": "22.4R3-S2-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "23.2",
        "lessThan": "23.2R2-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "23.4",
        "lessThan": "23.4R1-S1-EVO",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "23.4",
        "lessThan": "23.4R2-EVO",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unknown"
  }
]

References

supportportal.juniper.net/JSA82991

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

CVSS4

8.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

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

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

17.3%

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

JSON

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