QID 44159

Date Published: 2024-01-22

QID 44159: Juniper Network Operating System (Junos OS) Denial of Service (DoS) Vulnerability (JSA75723)

Juniper Junos is the network operating system used in Juniper Networks hardware systems.

An Improper Handling of Exceptional Conditions vulnerability in BGP session processing of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker, using specific timing outside the attacker's control, to flap BGP sessions and cause the routing protocol daemon (rpd) process to crash and restart, leading to a Denial of Service (DoS) condition.

Note: This issue only affects routers configured with non-stop routing (NSR) enabled.

This issue affects all versions of Junos OS:
All versions earlier than 20.4R3-S9
21.2 versions earlier than 21.2R3-S7
21.3 versions earlier than 21.3R3-S5
21.4 versions earlier than 21.4R3-S5
22.1 versions earlier than 22.1R3-S4
22.2 versions earlier than 22.2R3-S3
22.3 versions earlier than 22.3R3-S1
22.4 versions earlier than 22.4R2-S2, 22.4R3
23.2 versions earlier than 23.2R1-S1, 23.2R2

QID detection logic: (Authenticated)

It checks for vulnerable Junos OS version.

Successful exploitation of this vulnerability by the attacker will create a sustained Denial of Service (DoS) condition.

CVSS V3 rated as Medium - 5.9 severity.

CVSS V2 rated as Medium - 5.6 severity.

Solution

Vendor has released patch addressing the vulnerabilities, for more information please refer JSA75723

Workaround:
Long-Lived Graceful Restart (LLGR) helper mode can be disabled to prevent this issue. For example: [edit protocols bgp graceful-restart] disable;

Vendor References

JSA75723 - supportportal.juniper.net/JSA75723

CVEs related to QID 44159

CVE-2024-21585 |

Software Advisories

Advisory ID	Software	Component	Link
JSA75723			supportportal.juniper.net/JSA75723

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