Product Affected

This issue affects Junos OS 17.1 versions 17.1R3 and above prior to 17.3R3-S11, 17.4, 18.2, 18.3, 18.4, 19.1, 19.2, 19.3, 19.4, 20.1, 20.2, 20.3. Affected platforms: SRX Series.
High
7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Problem

On Juniper Networks SRX Series devices with link aggregation (lag) configured, executing any operation that fetches Aggregated Ethernet (AE) interface statistics, including but not limited to SNMP GET requests, causes a slow kernel memory leak. If all the available memory is consumed, the traffic will be impacted and a reboot might be required.

The following log can be seen if this issue happens.

/kernel: rt_pfe_veto: Memory over consumed. Op 1 err 12, rtsm_id 0:-1, msg type 72
/kernel: rt_pfe_veto: free kmem_map memory = (20770816) curproc = kmd

An administrator can use the following CLI command to monitor the status of memory consumption (ifstat bucket):

user@device > show system virtual-memory no-forwarding | match ifstat
Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
ifstat 2588977 162708K - 19633958 <<<<

user@device > show system virtual-memory no-forwarding | match ifstat
Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
ifstat 3021629 189749K - 22914415 <<<<

 

This issue affects Juniper Networks Junos OS on SRX Series:

  • 17.1 versions 17.1R3 and above prior to 17.3R3-S11;
  • 17.4 versions prior to 17.4R3-S5;
  • 18.2 versions prior to 18.2R3-S7, 18.2R3-S8;
  • 18.3 versions prior to 18.3R3-S4;
  • 18.4 versions prior to 18.4R2-S7, 18.4R3-S6;
  • 19.1 versions prior to 19.1R3-S4;
  • 19.2 versions prior to 19.2R1-S6;
  • 19.3 versions prior to 19.3R3-S1;
  • 19.4 versions prior to 19.4R3-S1;
  • 20.1 versions prior to 20.1R2, 20.1R3;
  • 20.2 versions prior to 20.2R2-S2, 20.2R3;
  • 20.3 versions prior to 20.3R1-S2, 20.3R2.

This issue does not affect Juniper Networks Junos OS prior to 17.1R3.

This issue affects SRX Series platforms with link aggregation configured:

[interfaces <interface ID> {gigether-options {802.3ad <aggregate interface ID> }}]

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2021-0230 .

Solution

The following software releases have been updated to resolve this specific issue: 17.3R3-S11, 17.4R3-S5, 18.2R3-S7, 18.2R3-S8, 18.3R3-S4, 18.4R2-S7, 18.4R3-S6, 19.1R3-S4, 19.2R1-S6, 19.3R3-S1, 19.4R3-S1, 20.1R2, 20.1R3, 20.2R2-S2, 20.2R3, 20.3R1-S2, 20.3R2, 20.4R1, and all subsequent releases.

This issue is being tracked as 1528605 .

Software releases or updates are available for download at https://support.juniper.net/support/downloads/

Workaround

There are no viable workarounds for this issue.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History

2021-04-14: Initial Publication.

2021-04-22: List of platforms which are not affected from this issue has been updated.

2021-05-17: List of platforms which are affected from this issue has been updated.

Related Information