Junos OS: Improper Handling of Exceptional Conditions
CVE-2024-30382 is a high-severity improper handling of exceptional conditions vulnerability in Junos OS from Juniper Networks, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 20.4R3-S10, 21.2R3-S8, 21.3R3 as the first without the flaw, so updating Junos OS to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.71% chance of exploitation within 30 days, higher than 54% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Junos OS to 20.4R3-S10 or 21.2R3-S8 or 21.3R3 or 21.4R3, whichever matches your release line, or a later version.
- Update Junos OS Evolved to 21.2R3-S8-EVO or 21.3R3-EVO or 21.4R3-EVO or 22.1R2-EVO, whichever matches your release line, or a later version.
- Update junos to 21.2R3-S8 or 21.3R3 or 21.4R3 or 22.1R2, whichever matches your release line, or a later version.
- Read the advisory on supportportal.juniper.net for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Juniper Networks | Junos OS | before 20.4R3-S10; 21.2 up to, but not including, 21.2R3-S8; 21.3 up to, but not including, 21.3R3; 21.4 up to, but not including, 21.4R3; 22.1 up to, but not including, 22.1R2 | 20.4R3-S10, 21.2R3-S8, 21.3R3, 21.4R3, 22.1R2 |
| Juniper Networks | Junos OS Evolved | before 21.2R3-S8-EVO; 21.3 up to, but not including, 21.3R3-EVO; 21.4 up to, but not including, 21.4R3-EVO; 22.1 up to, but not including, 22.1R2-EVO | 21.2R3-S8-EVO, 21.3R3-EVO, 21.4R3-EVO, 22.1R2-EVO |
| Juniper Networks | junos | 21.2 up to, but not including, 21.2R3-S8; 21.3 up to, but not including, 21.3R3; 21.4 up to, but not including, 21.4R3; 22.1 up to, but not including, 22.1R2; before 20.4R3-S10 | 21.2R3-S8, 21.3R3, 21.4R3, 22.1R2, 20.4R3-S10 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by CNA (juniper.net).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.7 | High | CNA (juniper.net) |
| CVSS 3.1 | 7.5 | High | CNA (juniper.net) |
Official description
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 send a specific routing update, causing an rpd core due to memory corruption, leading to a Denial of Service (DoS). This issue can only be triggered when the system is configured for CoS-based forwarding (CBF) with a policy map containing a cos-next-hop-map action (see below). This issue affects: Junos OS: * all versions before 20.4R3-S10, * from 21.2 before 21.2R3-S8, * from 21.3 before 21.3R3, * from 21.4 before 21.4R3, * from 22.1 before 22.1R2; Junos OS Evolved: * all versions before 21.2R3-S8-EVO, * from 21.3 before 21.3R3-EVO, * from 21.4 before 21.4R3-EVO, * from 22.1 before 22.1R2-EVO.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Handling of Exceptional Conditions
The product does not handle or incorrectly handles an exceptional condition.
More Improper Handling of Exceptional Conditions vulnerabilities (CWE-755)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other references
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