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cve[email protected]CVE-2021-0270
HistoryApr 22, 2021 - 8:15 p.m.

CVE-2021-0270

2021-04-2220:15:10
CWE-362
CWE-416
web.nvd.nist.gov
18
2
cve-2021-0270
juniper networks
junos os
ptx series
qfx10k series
vulnerability
dos
packet forwarding engine
microkernel
race condition
bgp
igp
fpcs
network instability

7.5 High

CVSS3

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

5.8 Medium

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

45.5%

On PTX Series and QFX10k Series devices with the โ€œinline-jflowโ€ feature enabled, a use after free weakness in the Packet Forwarding Engine (PFE) microkernel architecture of Juniper Networks Junos OS may allow an attacker to cause a Denial of Service (DoS) condition whereby one or more Flexible PIC Concentrators (FPCs) may restart. As this is a race condition situation this issue become more likely to be hit when network instability occurs, such as but not limited to BGP/IGP reconvergences, and/or further likely to occur when more active โ€œtraffic flowsโ€ are occurring through the device. When this issue occurs, it will cause one or more FPCs to restart unexpectedly. During FPC restarts core files will be generated. While the core file is generated traffic will be disrupted. Sustained receipt of large traffic flows and reconvergence-like situations may sustain the Denial of Service (DoS) situation. This issue affects: Juniper Networks Junos OS: 18.1 version 18.1R2 and later versions prior to 18.1R3-S10 on PTX Series, QFX10K Series.

Affected configurations

NVD
Node
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
juniperjunosMatch18.1r3-s7
OR
juniperjunosMatch18.1r3-s8
OR
juniperjunosMatch18.1r3-s9
AND
juniperptx1000Match-
OR
juniperptx10001-36mrMatch-
OR
juniperptx10002Match-
OR
juniperptx10003Match-
OR
juniperptx10004Match-
OR
juniperptx10008Match-
OR
juniperptx10016Match-
OR
juniperptx3000Match-
OR
juniperptx5000Match-
OR
juniperqfx10002Match-
OR
juniperqfx10008Match-
OR
juniperqfx10016Match-
CPENameOperatorVersion
juniper:junosjuniper junoseq18.1

CNA Affected

[
  {
    "platforms": [
      "PTX Series, QFX10K Series"
    ],
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "changes": [
          {
            "at": "18.1R3-S10",
            "status": "affected"
          }
        ],
        "lessThan": "18.1*",
        "status": "affected",
        "version": "18.1R2",
        "versionType": "custom"
      }
    ]
  }
]

Social References

More

7.5 High

CVSS3

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

5.8 Medium

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

45.5%

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