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CVE-2022-22240

Junos OS and Junos OS Evolved: An rpd memory leak might be observed while running a specific cli command in a RIB sharding scenario

Medium5.5EPSS 0.21%
Published
Updated
Reserved
Assigned by
juniper

Description

An Allocation of Resources Without Limits or Throttling and a Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a locally authenticated low privileged attacker to cause a Denial of Sevice (DoS). In a high-scaled BGP routing environment with rib-sharding enabled, two issues may occur when executing a specific CLI command. One is a memory leak issue with rpd where the leak rate is not constant, and the other is a temporary spike in rpd memory usage during command execution. This issue affects: Juniper Networks Junos OS 19.4 versions prior to 19.4R3-S9; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R1-S2, 21.2R2-S1, 21.2R3; 21.3 versions prior to 21.3R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S1-EVO; 21.1-EVO version 21.1R1-EVO and later versions; 21.2-EVO versions prior to 21.2R1-S2-EVO, 21.2R3-EVO; 21.3-EVO versions prior to 21.3R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R1.

Scores

CVSS scores of CVE-2022-22240, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Modified3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.21% · top 88% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • unaffected unspecified – < 19.2R1
    • affected 19.4 – < 19.4R3-S9
    • affected 20.2 – < 20.2R3-S5
    • affected 20.3 – < 20.3R3-S2
    • affected 20.4 – < 20.4R3-S1
    • affected 21.1 – < 21.1R3
    • affected 21.2 – < 21.2R1-S2, 21.2R2-S1, 21.2R3
    • affected 21.3 – < 21.3R2

  • Juniper Networks · Junos OS Evolved

    • affected unspecified – < 20.4R3-S1-EVO
    • affected 21.1R1-EVO – < 21.1-EVO*
    • affected 21.2-EVO – < 21.2R1-S2-EVO, 21.2R3-EVO
    • affected 21.3-EVO – < 21.3R2-EVO

What to do

Solution: The following software releases have been updated to resolve this specific issue: Junos OS:19.4R3-S9, 20.2R3-S5, 20.3R3-S2, 20.4R3-S1, 21.1R3, 21.2R1-S2, 21.2R2-S1, 21.2R3, 21.3R2, 21.4R1, and all subsequent releases. Junos OS Evolved: 20.4R3-S1-EVO, 21.2R1-S2-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.

Workaround: There are no known workarounds for this issue. To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks, hosts and users.

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

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .