SB2024071608 - Denial of service in Junos OS on MX Series with SPC3 line card

Security Bulletin ID SB2024071608

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Adjecent network

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Missing release of memory after effective lifetime (CVE-ID: CVE-2024-39550)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to missing release of memory after effective lifetime error in the rtlogd process. A remote non-authenticated attacker can trigger internal events cause (which can be done by repeated port flaps) to cause a slow memory leak, ultimately leading to a Denial of Service (DoS).

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2024-07-Security-Bulletin-Junos-OS-MX-Series-with-SPC3-line-card-Port-flaps-causes-rtlogd-memory-leak-leading-to-Denial-of-Service-CVE-2024-39550