Remote denial of service in Junos OS and Junos OS Evolved rpd



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-21593
CWE-ID CWE-664
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Juniper Junos OS
Operating systems & Components / Operating system

Junos OS Evolved
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper control of a resource through its lifetime

EUVDB-ID: #VU102521

Risk: Medium

CVSSv4.0: 6.6 [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]

CVE-ID: CVE-2025-21593

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

Exploit availability: No

Description

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

The vulnerability exists due to an improper control of a resource through its lifetime in the routing protocol daemon (rpd). A remote attacker can send a malformed BGP UPDATE packet to the affected device and perform a denial of service attack.

The vulnerability affects iBGP and eBGP, and both IPv4 and IPv6 protocols.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.1R1-S1 - 23.4R1

Junos OS Evolved: 21.1-EVO - 23.4R1-S2-EVO

CPE2.3 External links

https://supportportal.juniper.net/s/article/2025-01-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-On-SRv6-enabled-devices-an-attacker-sending-a-malformed-BGP-update-can-cause-the-rpd-to-crash-CVE-2025-21593


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###