SB2025041470 - Improper encoding or escaping of output in Juniper Junos OS

Security Bulletin ID SB2025041470

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Improper encoding or escaping of output (CVE-ID: CVE-2025-30657)

CWE-ID: CWE-116 - Improper Encoding or Escaping of Output

CVSSv4: CVSS:4.0/AV:N/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 service disruption.

The vulnerability exists due to improper encoding or escaping of output error in the Sampling Route Record Daemon (SRRD). A remote non-authenticated attacker can cause a Denial-of-Service (DoS).

When a device configured for flow-monitoring receives a specific BGP update message, it is correctly processed internally by the routing protocol daemon (rpd), but when it's sent to SRRD it's encoded incorrectly which leads to a crash and momentary interruption of jflow processing until it automatically restarts.

This issue does not affect traffic forwarding itself.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2025-04-Security-Bulletin-Junos-OS-Processing-of-a-specific-BGP-update-causes-the-SRRD-process-to-crash-CVE-2025-30657