CVE-2023-44204
Junos OS and Junos OS Evolved: The rpd will crash upon receiving a malformed BGP UPDATE message
An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts.
This issue affects both eBGP and iBGP implementations.
This issue affects:
Juniper Networks Junos OS
- 21.4 versions prior to 21.4R3-S4;
- 22.1 versions prior to 22.1R3-S3;
- 22.2 versions prior to 22.2R3-S2;
- 22.3 versions prior to 22.3R2-S2, 22.3R3;
- 22.4 versions prior to 22.4R2-S1, 22.4R3;
- 23.2 versions prior to 23.2R1, 23.2R2;
Juniper Networks Junos OS Evolved
- 21.4 versions prior to 21.4R3-S5-EVO;
- 22.1 versions prior to 22.1R3-S3-EVO;
- 22.2 versions prior to 22.2R3-S3-EVO;
- 22.3 versions prior to 22.3R2-S2-EVO;
- 22.4 versions prior to 22.4R3-EVO;
- 23.2 versions prior to 23.2R2-EVO;
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Junos OS and Junos OS Evolved: The rpd will crash upon receiving a malformed BGP UPDATE message
An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts.
This issue affects both eBGP and iBGP implementations.
This issue affects:
Juniper Networks Junos OS
- 21.4 versions prior to 21.4R3-S4;
- 22.1 versions prior to 22.1R3-S3;
- 22.2 versions prior to 22.2R3-S2;
- 22.3 versions prior to 22.3R2-S2, 22.3R3;
- 22.4 versions prior to 22.4R2-S1, 22.4R3;
- 23.2 versions prior to 23.2R1, 23.2R2;
Juniper Networks Junos OS Evolved
- 21.4 versions prior to 21.4R3-S5-EVO;
- 22.1 versions prior to 22.1R3-S3-EVO;
- 22.2 versions prior to 22.2R3-S3-EVO;
- 22.3 versions prior to 22.3R2-S2-EVO;
- 22.4 versions prior to 22.4R3-EVO;
- 23.2 versions prior to 23.2R2-EVO;
- Record
CVE-2023-44204- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1286
- Updated
- 2026-11-02
EUVDEUVD-2023-48563
An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts.
This issue affects both eBGP and iBGP implementations.
This issue affects:
Juniper Networks Junos OS
- 21.4 versions prior to 21.4R3-S4;
- 22.1 versions prior to 22.1R3-S3;
- 22.2 versions prior to 22.2R3-S2;
- 22.3 versions prior to 22.3R2-S2, 22.3R3;
- 22.4 versions prior to 22.4R2-S1, 22.4R3;
- 23.2 versions prior to 23.2R1, 23.2R2;
Juniper Networks Junos OS Evolved
- 21.4 versions prior to 21.4R3-S5-EVO;
- 22.1 versions prior to 22.1R3-S3-EVO;
- 22.2 versions prior to 22.2R3-S3-EVO;
- 22.3 versions prior to 22.3R2-S2-EVO;
- 22.4 versions prior to 22.4R3-EVO;
- 23.2 versions prior to 23.2R2-EVO;
- Record
EUVD-2023-48563- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jgpr-gfxw-cgxq
An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon...
An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts.
This issue affects both eBGP and iBGP implementations.
This issue affects:
Juniper Networks Junos OS
- 21.4 versions prior to 21.4R3-S4;
- 22.1 versions prior to 22.1R3-S3;
- 22.2 versions prior to 22.2R3-S2;
- 22.3 versions prior to 22.3R2-S2, 22.3R3;
- 22.4 versions prior to 22.4R2-S1, 22.4R3;
- 23.2 versions prior to 23.2R1, 23.2R2;
Juniper Networks Junos OS Evolved
- 21.4 versions prior to 21.4R3-S5-EVO;
- 22.1 versions prior to 22.1R3-S3-EVO;
- 22.2 versions prior to 22.2R3-S3-EVO;
- 22.3 versions prior to 22.3R2-S2-EVO;
- 22.4 versions prior to 22.4R3-EVO;
- 23.2 versions prior to 23.2R2-EVO;
- Record
GHSA-jgpr-gfxw-cgxq- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20, CWE-1286
- Updated
- 2026-11-02
NVD
An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts.
This issue affects both eBGP and iBGP implementations.
This issue affects:
Juniper Networks Junos OS
- 21.4 versions prior to 21.4R3-S4;
- 22.1 versions prior to 22.1R3-S3;
- 22.2 versions prior to 22.2R3-S2;
- 22.3 versions prior to 22.3R2-S2, 22.3R3;
- 22.4 versions prior to 22.4R2-S1, 22.4R3;
- 23.2 versions prior to 23.2R1, 23.2R2;
Juniper Networks Junos OS Evolved
- 21.4 versions prior to 21.4R3-S5-EVO;
- 22.1 versions prior to 22.1R3-S3-EVO;
- 22.2 versions prior to 22.2R3-S3-EVO;
- 22.3 versions prior to 22.3R2-S2-EVO;
- 22.4 versions prior to 22.4R3-EVO;
- 23.2 versions prior to 23.2R2-EVO;
- Record
CVE-2023-44204- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1286, CWE-20
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-44204 is a medium vulnerability (CVSS 6.5) in Juniper Junos, published October 12, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. No source names a fixed version.