CVE-2024-39549

Junos OS and Junos OS Evolved: Receipt of malformed BGP path attributes leads to a memory leak

HIGH

7.5

CVSS Score

Published: July 11, 2024 at 04:27 PM UTC

Updated: June 17, 2026 at 07:42 AM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

HIGH7.5

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

A Missing Release of Memory after Effective Lifetime vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This memory is not properly freed in all circumstances, leading to a Denial of Service (DoS). Consumed memory can be freed by manually restarting Routing Protocol Daemon (rpd). Memory utilization could be monitored by: user@host> show system memory or show system monitor memory status This issue affects: Junos OS: * All versions before 21.2R3-S8, * from 21.4 before 21.4R3-S8, * from 22.2 before 22.2R3-S4, * from 22.3 before 22.3R3-S3, * from 22.4 before 22.4R3-S3, * from 23.2 before 23.2R2-S1, * from 23.4 before 23.4R1-S2, 23.4R2. Junos OS Evolved: * All versions before 21.2R3-S8-EVO, * from 21.4 before 21.4R3-S8-EVO, * from 22.2 before 22.2R3-S4-EVO, * from 22.3 before 22.3R3-S3-EVO, * from 22.4 before 22.4R3-S3-EVO, * from 23.2 before 23.2R2-S1-EVO, * from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos OS Evolved · Juniper

95%

v ≤ 21.1v < 21.2R3-S8-EVO21.4 ≤ v < 21.4R3-S8-EVO22.2 ≤ v < 22.2R3-S4-EVO22.3 ≤ v < 22.3R3-S3-EVO22.4 ≤ v < 22.4R3-S3-EVO23.2 ≤ v < 23.2R2-S1-EVO23.4 ≤ v < 23.4R1-S2-EVO23.4 ≤ v < 23.4R2-EVO24.2 ≤ v < 24.2R2-EVO21.2 21.2 r1 21.2 r1-s1 21.2 r1-s2 21.2 r2 21.2 r2-s1 21.2 r2-s2 21.2 r3 21.2 r3-s1 21.2 r3-s2 21.2 r3-s3 21.2 r3-s4 21.2 r3-s5 21.2 r3-s6 21.2 r3-s7 21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 21.4 r2 21.4 r2-s1 21.4 r2-s2 21.4 r3 21.4 r3-s1 21.4 r3-s2 21.4 r3-s3 21.4 r3-s4 21.4 r3-s5 21.4 r3-s6 21.4 r3-s7 22.2 22.2 r1 22.2 r1-s1 22.2 r1-s2 22.2 r2 22.2 r2-s1 22.2 r2-s2 22.2 r3 22.2 r3-s1 22.2 r3-s2 22.2 r3-s3 22.3 22.3 r1 22.3 r1-s1 22.3 r1-s2 22.3 r2 22.3 r2-s1 22.3 r2-s2 22.3 r3 22.3 r3-s1 22.3 r3-s2 22.4 22.4 r1 22.4 r1-s1 22.4 r1-s2 22.4 r2 22.4 r2-s1 22.4 r2-s2 22.4 r3 22.4 r3-s1 22.4 r3-s2 23.2 23.2 r1 23.2 r1-s1 23.2 r1-s2 23.2 r2 23.4 23.4 r1 23.4 r1-s1 24.2 24.2 r1

Affected range stops below 21.2R3-S8-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R3-S8-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S1-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R1-S2-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.2R2-EVO, so it looks safe — our inference, not a vendor statement

Junos · Juniper Networks

95%

v ≤ 21.1v < 21.2R3-S821.4 ≤ v < 21.4R3-S822.2 ≤ v < 22.2R3-S422.3 ≤ v < 22.3R3-S322.4 ≤ v < 22.4R3-S323.2 ≤ v < 23.2R2-S123.4 ≤ v < 23.4R1-S223.4 ≤ v < 23.4R1-S2, 23.4R223.4 ≤ v < 23.4R224.2 ≤ v < 24.2R221.2 21.2 r1 21.2 r1-s1 21.2 r1-s2 21.2 r2 21.2 r2-s1 21.2 r2-s2 21.2 r3 21.2 r3-s1 21.2 r3-s2 21.2 r3-s3 21.2 r3-s4 21.2 r3-s5 21.2 r3-s6 21.2 r3-s7 21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 21.4 r2 21.4 r2-s1 21.4 r2-s2 21.4 r3 21.4 r3-s1 21.4 r3-s2 21.4 r3-s3 21.4 r3-s4 21.4 r3-s5 21.4 r3-s6 21.4 r3-s7 22.2 22.2 r1 22.2 r1-s1 22.2 r1-s2 22.2 r2 22.2 r2-s1 22.2 r2-s2 22.2 r3 22.2 r3-s1 22.2 r3-s2 22.2 r3-s3 22.3 22.3 r1 22.3 r1-s1 22.3 r1-s2 22.3 r2 22.3 r2-s1 22.3 r2-s2 22.3 r3 22.3 r3-s1 22.3 r3-s2 22.4 22.4 r1 22.4 r1-s1 22.4 r1-s2 22.4 r2 22.4 r2-s1 22.4 r2-s2 22.4 r3 22.4 r3-s1 22.4 r3-s2 23.2 23.2 r1 23.2 r1-s1 23.2 r1-s2 23.2 r2 23.4 23.4 r1 23.4 r1-s1 24.2 24.2 r1

Affected range stops below 21.2R3-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R3-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R1-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R1-S2, 23.4R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.2R2, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

60%

v < 21.2R3-S8-EVO21.4 ≤ v < 21.4R3-S8-EVO22.2 ≤ v < 22.2R3-S4-EVO22.3 ≤ v < 22.3R3-S3-EVO22.4 ≤ v < 22.4R3-S3-EVO23.2 ≤ v < 23.2R2-S1-EVO23.4 ≤ v < 23.4R1-S2-EVO, 23.4R2-EVO21.4 22.2 22.3 22.4 23.2 23.4

Affected range stops below 21.2R3-S8-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R3-S8-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S1-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R1-S2-EVO, 23.4R2-EVO, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://supportportal.juniper.net/JSA83011

References (1)

Vendor Advisory

Source: [email protected]

https://supportportal.juniper.net/JSA83011

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHjuniper

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-401

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