CVE-2024-39552
Junos OS and Junos OS Evolved: Malformed BGP UPDATE causes RPD crash
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.
Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.
This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.
This issue affects:
Juniper Networks 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-S6;
- 22.1 versions earlier than 22.1R3-S4;
- 22.2 versions earlier than 22.2R3-S3;
- 22.3 versions earlier than 22.3R3-S2;
- 22.4 versions earlier than 22.4R3;
- 23.2 versions earlier than 23.2R2.
Juniper Networks Junos OS Evolved:
- All versions earlier than 21.2R3-S7;
- 21.3-EVO versions earlier than 21.3R3-S5;
- 21.4-EVO versions earlier than 21.4R3-S8;
- 22.1-EVO versions earlier than 22.1R3-S4;
- 22.2-EVO versions earlier than 22.2R3-S3;
- 22.3-EVO versions earlier than 22.3R3-S2;
- 22.4-EVO versions earlier than 22.4R3;
- 23.2-EVO versions earlier than 23.2R2.
Attack profile
How easy it is to exploit
- Attack vector
- 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: Malformed BGP UPDATE causes RPD crash
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.
Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.
This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.
This issue affects:
Juniper Networks 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-S6;
- 22.1 versions earlier than 22.1R3-S4;
- 22.2 versions earlier than 22.2R3-S3;
- 22.3 versions earlier than 22.3R3-S2;
- 22.4 versions earlier than 22.4R3;
- 23.2 versions earlier than 23.2R2.
Juniper Networks Junos OS Evolved:
- All versions earlier than 21.2R3-S7;
- 21.3-EVO versions earlier than 21.3R3-S5;
- 21.4-EVO versions earlier than 21.4R3-S8;
- 22.1-EVO versions earlier than 22.1R3-S4;
- 22.2-EVO versions earlier than 22.2R3-S3;
- 22.3-EVO versions earlier than 22.3R3-S2;
- 22.4-EVO versions earlier than 22.4R3;
- 23.2-EVO versions earlier than 23.2R2.
- Record
CVE-2024-39552- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-755
- Updated
- 2026-11-02
EUVDEUVD-2024-38078
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.
Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.
This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.
This issue affects:
Juniper Networks 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-S6;
- 22.1 versions earlier than 22.1R3-S4;
- 22.2 versions earlier than 22.2R3-S3;
- 22.3 versions earlier than 22.3R3-S2;
- 22.4 versions earlier than 22.4R3;
- 23.2 versions earlier than 23.2R2.
Juniper Networks Junos OS Evolved:
- All versions earlier than 21.2R3-S7;
- 21.3-EVO versions earlier than 21.3R3-S5;
- 21.4-EVO versions earlier than 21.4R3-S8;
- 22.1-EVO versions earlier than 22.1R3-S4;
- 22.2-EVO versions earlier than 22.2R3-S3;
- 22.3-EVO versions earlier than 22.3R3-S2;
- 22.4-EVO versions earlier than 22.4R3;
- 23.2-EVO versions earlier than 23.2R2.
- Record
EUVD-2024-38078- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3fgw-53wh-c98c
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD)...
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.
Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.
This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.
This issue affects:
Juniper Networks 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-S6;
- 22.1 versions earlier than 22.1R3-S4;
- 22.2 versions earlier than 22.2R3-S3;
- 22.3 versions earlier than 22.3R3-S2;
- 22.4 versions earlier than 22.4R3;
- 23.2 versions earlier than 23.2R2.
Juniper Networks Junos OS Evolved:
- All versions earlier than 21.2R3-S7;
- 21.3-EVO versions earlier than 21.3R3-S5;
- 21.4-EVO versions earlier than 21.4R3-S8;
- 22.1-EVO versions earlier than 22.1R3-S4;
- 22.2-EVO versions earlier than 22.2R3-S3;
- 22.3-EVO versions earlier than 22.3R3-S2;
- 22.4-EVO versions earlier than 22.4R3;
- 23.2-EVO versions earlier than 23.2R2.
- Record
GHSA-3fgw-53wh-c98c- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-755
- Updated
- 2026-11-02
NVD
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.
Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.
This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.
This issue affects:
Juniper Networks 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-S6;
- 22.1 versions earlier than 22.1R3-S4;
- 22.2 versions earlier than 22.2R3-S3;
- 22.3 versions earlier than 22.3R3-S2;
- 22.4 versions earlier than 22.4R3;
- 23.2 versions earlier than 23.2R2.
Juniper Networks Junos OS Evolved:
- All versions earlier than 21.2R3-S7;
- 21.3-EVO versions earlier than 21.3R3-S5;
- 21.4-EVO versions earlier than 21.4R3-S8;
- 22.1-EVO versions earlier than 22.1R3-S4;
- 22.2-EVO versions earlier than 22.2R3-S3;
- 22.3-EVO versions earlier than 22.3R3-S2;
- 22.4-EVO versions earlier than 22.4R3;
- 23.2-EVO versions earlier than 23.2R2.
- Record
CVE-2024-39552- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-755
- 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-2024-39552 is a high vulnerability (CVSS 8.7) in Juniper Junos, published July 11, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.59%, the 48th percentile. No source names a fixed version.