CVE-2024-39561
Junos OS: SRX4600, SRX5000 Series: TCP packets with SYN/FIN or SYN/RST are transferred after enabling no-syn-check with Express Path
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX4600 and SRX5000 Series allows an attacker to send TCP packets with SYN/FIN or SYN/RST flags, bypassing the expected blocking of these packets. A TCP packet with SYN/FIN or SYN/RST should be dropped in flowd. However, when no-syn-check and Express Path are enabled, these TCP packets are unexpectedly transferred to the downstream network. This issue affects Junos OS on SRX4600 and SRX5000 Series: * All versions before 21.2R3-S8, * from 21.4 before 21.4R3-S7, * from 22.1 before 22.1R3-S6, * from 22.2 before 22.2R3-S4, * from 22.3 before 22.3R3-S3, * from 22.4 before 22.4R3-S2, * from 23.2 before 23.2R2, * from 23.4 before 23.4R1-S1, 23.4R2.
Una vulnerabilidad de verificación inadecuada de condiciones inusuales o excepcionales en el demonio de flujo (flowd) de Juniper Networks Junos OS en las series SRX4600 y SRX5000 permite a un atacante enviar paquetes TCP con indicadores SYN/FIN o SYN/RST, evitando el bloqueo esperado de estos paquetes. . Un paquete TCP con SYN/FIN o SYN/RST debe descartarse en flowd. Sin embargo, cuando no-syn-check y Express Path están habilitados, estos paquetes TCP se transfieren inesperadamente a la red descendente. Este problema afecta a Junos OS en las series SRX4600 y SRX5000: * Todas las versiones anteriores a 21.2R3-S8, * desde 21.4 antes de 21.4R3-S7, * desde 22.1 antes de 22.1R3-S6, * desde 22.2 antes de 22.2R3-S4, * desde 22.3 antes de 22.3R3-S3, * desde 22.4 antes de 22.4R3-S2, * desde 23.2 antes de 23.2R2, * desde 23.4 antes de 23.4R1-S1, 23.4R2.
An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX4600 and SRX5000 Series allows an attacker to send TCP packets with SYN/FIN or SYN/RST flags, bypassing the expected blocking of these packets. A TCP packet with SYN/FIN or SYN/RST should be dropped in flowd. However, when no-syn-check and Express Path are enabled, these TCP packets are unexpectedly transferred to the downstream network. This issue affects Junos OS on SRX4600 and SRX5000 Series: * All versions before 21.2R3-S8, * from 21.4 before 21.4R3-S7, * from 22.1 before 22.1R3-S6, * from 22.2 before 22.2R3-S4, * from 22.3 before 22.3R3-S3, * from 22.4 before 22.4R3-S2, * from 23.2 before 23.2R2, * from 23.4 before 23.4R1-S1, 23.4R2.
CVSS Scores
SSVC
- Decision:Attend
Timeline
- 2024-06-25 CVE Reserved
- 2024-07-10 CVE Published
- 2024-08-02 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-754: Improper Check for Unusual or Exceptional Conditions
CAPEC
References (1)
URL | Tag | Source |
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URL | Date | SRC |
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URL | Date | SRC |
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URL | Date | SRC |
---|---|---|
https://supportportal.juniper.net/JSA83021 | 2024-07-11 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | < 21.2R3-S8 Search vendor "Juniper Networks" for product "Junos OS" and version " < 21.2R3-S8" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 21.4 < 21.4R3-S7 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 21.4 < 21.4R3-S7" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 22.1 < 22.1R3-S6 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.1 < 22.1R3-S6" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 22.2 < 22.2R3-S4 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.2 < 22.2R3-S4" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 22.3 < 22.3R3-S3 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.3 < 22.3R3-S3" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 22.4 < 22.4R3-S2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.4 < 22.4R3-S2" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 23.2 < 23.2R2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 23.2 < 23.2R2" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 23.4 < 23.4R1-S1 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 23.4 < 23.4R1-S1" | en |
Affected
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Juniper Networks Search vendor "Juniper Networks" | Junos OS Search vendor "Juniper Networks" for product "Junos OS" | >= 23.4 < 23.4R2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 23.4 < 23.4R2" | en |
Affected
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