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cve[email protected]CVE-2020-1603
HistoryJan 15, 2020 - 9:15 a.m.

CVE-2020-1603

2020-01-1509:15:12
CWE-401
CWE-710
web.nvd.nist.gov
43
cve-2020-1603
juniper networks
junos os
ipv6
dos
security vulnerability
re
mbuf
memory leak
kernel crash

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

8.3 High

AI Score

Confidence

High

7.8 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.001 Low

EPSS

Percentile

45.5%

Specific IPv6 packets sent by clients processed by the Routing Engine (RE) are improperly handled. These IPv6 packets are designed to be blocked by the RE from egressing the RE. Instead, the RE allows these specific IPv6 packets to egress the RE, at which point a mbuf memory leak occurs within the Juniper Networks Junos OS device. This memory leak eventually leads to a kernel crash (vmcore), or the device hanging and requiring a power cycle to restore service, creating a Denial of Service (DoS) condition. During the time where mbufs are rising, yet not fully filled, some traffic from client devices may begin to be black holed. To be black holed, this traffic must match the condition where this traffic must be processed by the RE. Continued receipt and attempted egress of these specific IPv6 packets from the Routing Engine (RE) will create an extended Denial of Service (DoS) condition. Scenarios which have been observed are: 1. In a single chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario the device needs to be power cycled. 2. In a single chassis, dual RE scenario, the device master RE will fail over to the backup RE. In this scenario, the master and the backup REs need to be reset from time to time when they vmcore. There is no need to power cycle the device. 3. In a dual chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario, the two chassis’ design relies upon some type of network level redundancy - VRRP, GRES, NSR, etc. - 3.a In a commanded switchover, where nonstop active routing (NSR) is enabled no session loss is observed. 4. In a dual chassis, dual chassis scenario, rely upon the RE to RE failover as stated in the second scenario. In the unlikely event that the device does not switch RE to RE gracefully, then the fallback position is to the network level services scenario in the third scenario. This issue affects: Juniper Networks Junos OS 16.1 versions prior to 16.1R7-S6; 16.1 version 16.1X70-D10 and later; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D50, 18.2X75-D410; 18.3 versions prior to 18.3R1-S6, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R1-S6, 18.4R2-S2, 18.4R3; 19.1 versions prior to 19.1R1-S3, 19.1R2; 19.2 versions prior to 19.2R1-S2, 19.2R2. This issue does not affect releases prior to Junos OS 16.1R1.

Affected configurations

NVD
Node
juniperjunosMatch16.1-
OR
juniperjunosMatch16.1r1
OR
juniperjunosMatch16.1r2
OR
juniperjunosMatch16.1r3
OR
juniperjunosMatch16.1r3-s10
OR
juniperjunosMatch16.1r4
OR
juniperjunosMatch16.1r5-s4
OR
juniperjunosMatch16.1r6-s1
OR
juniperjunosMatch16.1r7
OR
juniperjunosMatch16.1r7-s2
OR
juniperjunosMatch16.1r7-s3
OR
juniperjunosMatch16.1r7-s4
OR
juniperjunosMatch16.1r7-s5
OR
juniperjunosMatch16.1x70
OR
juniperjunosMatch16.2-
OR
juniperjunosMatch16.2r1
OR
juniperjunosMatch16.2r2
OR
juniperjunosMatch16.2r2-s1
OR
juniperjunosMatch16.2r2-s10
OR
juniperjunosMatch16.2r2-s2
OR
juniperjunosMatch16.2r2-s5
OR
juniperjunosMatch16.2r2-s6
OR
juniperjunosMatch16.2r2-s7
OR
juniperjunosMatch16.2r2-s8
OR
juniperjunosMatch16.2r2-s9
OR
juniperjunosMatch17.1-
OR
juniperjunosMatch17.1r1
OR
juniperjunosMatch17.1r2-s1
OR
juniperjunosMatch17.1r2-s10
OR
juniperjunosMatch17.1r2-s2
OR
juniperjunosMatch17.1r2-s3
OR
juniperjunosMatch17.1r2-s4
OR
juniperjunosMatch17.1r2-s5
OR
juniperjunosMatch17.1r2-s6
OR
juniperjunosMatch17.1r2-s7
OR
juniperjunosMatch17.1r2-s9
OR
juniperjunosMatch17.1r3
OR
juniperjunosMatch17.2-
OR
juniperjunosMatch17.2r1-s2
OR
juniperjunosMatch17.2r1-s4
OR
juniperjunosMatch17.2r1-s7
OR
juniperjunosMatch17.2r1-s8
OR
juniperjunosMatch17.2r2-s6
OR
juniperjunosMatch17.2r2-s7
OR
juniperjunosMatch17.2r3
OR
juniperjunosMatch17.2r3-s1
OR
juniperjunosMatch17.2r3-s2
OR
juniperjunosMatch17.3-
OR
juniperjunosMatch17.3r1-s1
OR
juniperjunosMatch17.3r2
OR
juniperjunosMatch17.3r2-s1
OR
juniperjunosMatch17.3r2-s2
OR
juniperjunosMatch17.3r3-s1
OR
juniperjunosMatch17.3r3-s2
OR
juniperjunosMatch17.3r3-s3
OR
juniperjunosMatch17.3r3-s4
OR
juniperjunosMatch17.3r3-s5
OR
juniperjunosMatch17.4-
OR
juniperjunosMatch17.4r1
OR
juniperjunosMatch17.4r1-s1
OR
juniperjunosMatch17.4r1-s2
OR
juniperjunosMatch17.4r1-s4
OR
juniperjunosMatch17.4r1-s6
OR
juniperjunosMatch17.4r1-s7
OR
juniperjunosMatch17.4r2
OR
juniperjunosMatch17.4r2-s1
OR
juniperjunosMatch17.4r2-s2
OR
juniperjunosMatch17.4r2-s3
OR
juniperjunosMatch17.4r2-s4
OR
juniperjunosMatch17.4r2-s5
OR
juniperjunosMatch17.4r2-s6
OR
juniperjunosMatch17.4r2-s7
OR
juniperjunosMatch17.4r2-s8
OR
juniperjunosMatch18.1-
OR
juniperjunosMatch18.1r2
OR
juniperjunosMatch18.1r2-s1
OR
juniperjunosMatch18.1r2-s2
OR
juniperjunosMatch18.1r2-s4
OR
juniperjunosMatch18.1r3
OR
juniperjunosMatch18.1r3-s1
OR
juniperjunosMatch18.1r3-s2
OR
juniperjunosMatch18.1r3-s3
OR
juniperjunosMatch18.1r3-s4
OR
juniperjunosMatch18.1r3-s5
OR
juniperjunosMatch18.1r3-s6
OR
juniperjunosMatch18.2-
OR
juniperjunosMatch18.2r1-s5
OR
juniperjunosMatch18.2r2-s1
OR
juniperjunosMatch18.2r2-s2
OR
juniperjunosMatch18.2r2-s3
OR
juniperjunosMatch18.2r2-s4
OR
juniperjunosMatch18.2r3
OR
juniperjunosMatch18.2r3-s1
OR
juniperjunosMatch18.2x75
OR
juniperjunosMatch18.2x75d20
OR
juniperjunosMatch18.2x75d40
OR
juniperjunosMatch18.3-
OR
juniperjunosMatch18.3r1
OR
juniperjunosMatch18.3r1-s1
OR
juniperjunosMatch18.3r1-s2
OR
juniperjunosMatch18.3r1-s3
OR
juniperjunosMatch18.3r1-s4
OR
juniperjunosMatch18.3r1-s5
OR
juniperjunosMatch18.3r2
OR
juniperjunosMatch18.3r2-s1
OR
juniperjunosMatch18.4-
OR
juniperjunosMatch18.4r1
OR
juniperjunosMatch18.4r1-s1
OR
juniperjunosMatch18.4r1-s2
OR
juniperjunosMatch18.4r1-s3
OR
juniperjunosMatch18.4r1-s4
OR
juniperjunosMatch18.4r1-s5
OR
juniperjunosMatch18.4r2
OR
juniperjunosMatch18.4r2-s1
OR
juniperjunosMatch19.1r1
OR
juniperjunosMatch19.1r1-s1
OR
juniperjunosMatch19.1r1-s2
OR
juniperjunosMatch19.2r1
OR
juniperjunosMatch19.2r1-s1

CNA Affected

[
  {
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "changes": [
          {
            "at": "16.1X70-D10",
            "status": "affected"
          }
        ],
        "lessThan": "16.1R7-S6",
        "status": "affected",
        "version": "16.1",
        "versionType": "custom"
      },
      {
        "lessThan": "16.2R2-S11",
        "status": "affected",
        "version": "16.2",
        "versionType": "custom"
      },
      {
        "lessThan": "17.1R2-S11, 17.1R3-S1",
        "status": "affected",
        "version": "17.1",
        "versionType": "custom"
      },
      {
        "lessThan": "17.2R1-S9, 17.2R2-S8, 17.2R3-S3",
        "status": "affected",
        "version": "17.2",
        "versionType": "custom"
      },
      {
        "lessThan": "17.3R3-S6",
        "status": "affected",
        "version": "17.3",
        "versionType": "custom"
      },
      {
        "lessThan": "17.4R2-S9, 17.4R3",
        "status": "affected",
        "version": "17.4",
        "versionType": "custom"
      },
      {
        "lessThan": "18.1R3-S7",
        "status": "affected",
        "version": "18.1",
        "versionType": "custom"
      },
      {
        "lessThan": "18.2R3-S2",
        "status": "affected",
        "version": "18.2",
        "versionType": "custom"
      },
      {
        "lessThan": "18.2X75-D50, 18.2X75-D410",
        "status": "affected",
        "version": "18.2X75",
        "versionType": "custom"
      },
      {
        "lessThan": "18.3R1-S6, 18.3R2-S2, 18.3R3",
        "status": "affected",
        "version": "18.3",
        "versionType": "custom"
      },
      {
        "lessThan": "18.4R1-S6, 18.4R2-S2, 18.4R3",
        "status": "affected",
        "version": "18.4",
        "versionType": "custom"
      },
      {
        "lessThan": "19.1R1-S3, 19.1R2",
        "status": "affected",
        "version": "19.1",
        "versionType": "custom"
      },
      {
        "lessThan": "19.2R1-S2, 19.2R2",
        "status": "affected",
        "version": "19.2",
        "versionType": "custom"
      }
    ]
  }
]

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

8.3 High

AI Score

Confidence

High

7.8 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.001 Low

EPSS

Percentile

45.5%

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