CVE-2021-0272

Summary

A kernel memory leak in QFX10002-32Q, QFX10002-60C, QFX10002-72Q, QFX10008, QFX10016 devices Flexible PIC Concentrators (FPCs) on Juniper Networks Junos OS allows an attacker to send genuine packets destined to the device to cause a Denial of Service (DoS) to the device. On QFX10002-32Q, QFX10002-60C, QFX10002-72Q devices the device will crash and restart. On QFX10008, QFX10016 devices, depending on the number of FPCs involved in an attack, one more more FPCs may crash and traffic through the device may be degraded in other ways, until the attack traffic stops. A reboot is required to restore service and clear the kernel memory. Continued receipt and processing of these genuine packets will create a sustained Denial of Service (DoS) condition. On QFX10008, QFX10016 devices, an indicator of compromise may be the existence of DCPFE core files. You can also monitor PFE memory utilization for incremental growth: user@qfx-RE:0% cprod -A fpc0 -c "show heap 0" | grep -i ke 0 3788a1b0 3221225048 2417120656 804104392 24 Kernel user@qfx-RE:0% cprod -A fpc0 -c "show heap 0" | grep -i ke 0 3788a1b0 3221225048 2332332200 888892848 27 Kernel This issue affects: Juniper Networks Junos OS on QFX10002-32Q, QFX10002-60C, QFX10002-72Q, QFX10008, QFX10016: 16.1 versions 16.1R1 and above prior to 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R3-S2; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R3; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R2. This issue does not affect releases prior to Junos OS 16.1R1. This issue does not affect EX Series devices. This issue does not affect Junos OS Evolved.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OSunspecified < 16.1R1unaffected
Juniper NetworksJunos OS17.3 < 17.3R3-S9affected
Juniper NetworksJunos OS17.4 < 17.4R3-S2affected
Juniper NetworksJunos OS18.1 < 18.1R3-S11affected
Juniper NetworksJunos OS18.2 < 18.2R3-S5affected
Juniper NetworksJunos OS18.3 < 18.3R3-S3affected
Juniper NetworksJunos OS18.4 < 18.4R2-S5, 18.4R3-S4affected
Juniper NetworksJunos OS19.1 < 19.1R3-S2affected
Juniper NetworksJunos OS19.2 < 19.2R3affected
Juniper NetworksJunos OS19.3 < 19.3R3affected
Juniper NetworksJunos OS19.4 < 19.4R3affected
Juniper NetworksJunos OS20.1 < 20.1R2affected
Juniper NetworksJunos OS16.1R1 < 16.1*affected

Weaknesses

  • CWE-401: CWE-401 Missing Release of Memory after Effective Lifetime
  • Denial of Service (DoS)

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CVE Program Container

Additional References

References