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CVE-2022-22208

Junos OS and Junos OS Evolved: An rpd crash can occur due to memory corruption caused by flapping BGP sessions

Medium5.9EPSS 0.52%
Published
Updated
Reserved
Assigned by
juniper

Description

A Use After Free vulnerability in the Routing Protocol Daemon (rdp) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause Denial of Service (DoS). When a BGP session flap happens, a Use After Free of a memory location that was assigned to another object can occur, which will lead to an rpd crash. This is a race condition that is outside of the attacker's control and cannot be deterministically exploited. Continued flapping of BGP sessions can create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: All versions prior to 18.4R2-S9, 18.4R3-S11; 19.1 versions prior to 19.1R3-S8; 19.2 version 19.2R1 and later versions; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S6; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R3-S3; 21.2 versions prior to 21.2R2-S1, 21.2R3. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S4-EVO; 21.1-EVO versions prior to 21.1R3-S2-EVO; 21.2-EVO versions prior to 21.2R3-EVO; 21.3-EVO versions prior to 21.3R2-EVO.

Timeline

  1. ID reserved

    By juniper

  2. · 10 months later

    Published

  3. · 3 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-22208, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1Medium5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Modified3.1Medium5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.52% · top 56% 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 5.9.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected unspecified – < 18.4R2-S9, 18.4R3-S11
    • affected 19.1 – < 19.1R3-S8
    • affected 19.2R1 – < 19.2*
    • affected 19.3 – < 19.3R3-S5
    • affected 19.4 – < 19.4R2-S6, 19.4R3-S6
    • affected 20.1R1 – < 20.1*
    • affected 20.2 – < 20.2R3-S3
    • affected 20.3 – < 20.3R3-S2
    • affected 20.4 – < 20.4R3-S1
    • affected 21.1 – < 21.1R3-S3
    • affected 21.2 – < 21.2R2-S1, 21.2R3

  • Juniper Networks · Junos OS Evolved

    • affected unspecified – < 20.4R3-S4-EVO
    • affected 21.1-EVO – < 21.1R3-S2-EVO
    • affected 21.2-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: 18.4R2-S9, 18.4R3-S11, 19.1R3-S8, 19.3R3-S5, 19.4R2-S6, 19.4R3-S6, 20.2R3-S3, 20.3R3-S2, 20.4R3-S1, 21.1R3-S3, 21.2R2-S1, 21.2R3, 21.3R1, and all subsequent releases. Junos OS Evolved: 20.4R3-S4-EVO, 21.1R3-S2-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.

Workaround: There are no viable workarounds for this issue.

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 .