Product Affected

This issue affects all versions of Junos OS earlier than 21.2R3-S7, 21.3, 21.4, 22.1, 22.2, 22.3, 22.4, 23.2. This issue affects all versions of Junos OS Evolved earlier than 21.2R3-S7-EVO, 21.3-EVO, 21.4-EVO, 22.1-EVO, 22.2-EVO, 22.3-EVO, 22.4-EVO, 23.2-EVO.
High
CVSS 3.1: 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0: 8.7 (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)

Problem

An Improper Check for Unusual or Exceptional Conditions vulnerability in Routing Protocol Daemon (RPD) of Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause Denial of Service (DoS).

If a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart.

This issue affects:

Junos OS:

  • All versions before 21.2R3-S7, 
  • from 21.3 before 21.3R3-S5, 
  • from 21.4 before 21.4R3-S5, 
  • from 22.1 before 22.1R3-S5, 
  • from 22.2 before 22.2R3-S3, 
  • from 22.3 before 22.3R3-S2, 
  • from 22.4 before 22.4R3, 
  • from 23.2 before 23.2R1-S2, 23.2R2.

Junos OS Evolved:

  • All versions before 21.2R3-S7-EVO, 
  • from 21.3-EVO before 21.3R3-S5-EVO, 
  • from 21.4-EVO before 21.4R3-S5-EVO, 
  • from 22.2-EVO before 22.2R3-S3-EVO, 
  • from 22.3-EVO before 22.3R3-S2-EVO, 
  • from 22.4-EVO before 22.4R3-EVO, 
  • from 23.2-EVO before 23.2R1-S2-EVO, 23.2R2-EVO.

This is a related but separate issue from the one described in JSA75739 [juniper.net].

To be exposed to this vulnerability BGP needs to be configured as in the following example, but no further options need to be enabled:

  [protocols bgp group <group> neighbor ...]

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was discovered during production use.

This issue has been assigned CVE-2024-30395 .

Solution

The following software releases have been updated to resolve this specific issue:

Junos OS: 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S5, 22.2R3-S3, 22.3R3-S2, 22.4R3, 23.2R1-S2, 23.2R2, 23.4R1, and all subsequent releases.

Junos OS Evolved: 21.2R3-S7-EVO, 21.3R3-S5-EVO, 21.4R3-S5-EVO, 22.2R3-S3-EVO, 22.3R3-S2-EVO, 22.4R3-EVO, 23.2R1-S2-EVO, 23.2R2-EVO, 23.4R1-EVO, and all subsequent releases.

This issue is being tracked as 1750441 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Workaround

There are no available workarounds for this issue.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories.

Modification History

2024-09-13: Minor formatting change to cvss field.
2024-04-10: Initial Publication

Related Information

Acknowledgements

The Juniper SIRT would like to acknowledge and thank Matteo Memelli from Amazon for responsibly reporting this vulnerability.