Medium severity · published Apr 12, 2024
CVE-2024-30390
Junos OS Evolved: Connection limits is not being enforced while the resp. rate limit is being enforced
5.3
CVSS
0.5%
EPSS
No
On KEV
Description
An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited Denial of Service (DoS) to the management plane.
When an incoming connection was blocked because it exceeded the connections-per-second rate-limit, the system doesn't consider existing connections anymore for subsequent connection attempts so that the connection limit can be exceeded.
This issue affects Junos OS Evolved:
* All versions before 21.4R3-S4-EVO,
* 22.1-EVO versions before 22.1R3-S3-EVO,
* 22.2-EVO versions before 22.2R3-S2-EVO,
* 22.3-EVO versions before 22.3R2-S1-EVO, 22.3R3-EVO.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JO
Junos OS Evolved · Juniper Networks
before 21.4R3-S4-EVO; 22.1-EVO before 22.1R3-S3-EVO; 22.2-EVO before 22.2R3-S2-EVO; 22.3-EVO before 22.3R2-S1-EVO, 22.3R3-EVO · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-30390
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-30390
Vendor Advisory
http://supportportal.juniper.net/JSA79183
Issue Tracking
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
More from Junos OS Evolved
9.8
CVE-2026-101954
Junos OS and Junos OS Evolved: Unauthenticated network access causes full device takeover when J-Web is enabled
9.8
CVE-2026-101983
Junos OS and Junos OS Evolved: An attacker causes remote code execution when J-Web virtual-domain is configured
9.8
CVE-2026-101982
Junos OS and Junos OS Evolved: A EVPN peer causes an rpd crash or root-level compromise when EVPN-VPWS is used
9.8
CVE-2026-33796
Junos OS and Junos OS Evolved: An attacker causes remote root command execution when BMP route monitoring is enabled
9.8
CVE-2026-33789
Junos OS and Junos OS Evolved: With BGP Monitoring Protocol is enabled, receipt of a specifically crafted BGP route update results in denial of service