Linux kernel (TIPC kernel module): Excessive Platform Resource Consumption within a Loop
CVE-2023-1390 is a high-severity excessive platform resource consumption within a loop vulnerability in Linux kernel (TIPC kernel module), 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. Affected Linux kernel (TIPC kernel module) versions: Fixed in kernel 5.11-rc4. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 5.1% chance of exploitation within 30 days, which is in the top 7.51% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux Kernel to 4.9.253 or 4.14.217 or 4.19.170 or 5.4.92, whichever matches your release line, or a later version.
- Read the advisory on github.com 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 |
|---|---|---|---|
| Linux kernel (TIPC kernel module) | Linux kernel (TIPC kernel module) | Fixed in kernel 5.11-rc4 | Not stated |
| Linux | Linux Kernel | 4.3 up to, but not including, 4.9.253; 4.10 up to, but not including, 4.14.217; 4.15 up to, but not including, 4.19.170; 4.20 up to, but not including, 5.4.92; 5.5 up to, but not including, 5.10.10; 5.11 | 4.9.253, 4.14.217, 4.19.170, 5.4.92, 5.10.10 |
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 NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.1 | 7.5 | High | CISA (ADP) |
Official description
A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module. The while loop in tipc_link_xmit() hits an unknown state while attempting to parse SKBs, which are not in the queue. Sending two small UDP packets to a system with a UDP bearer results in the CPU utilization for the system to instantly spike to 100%, causing a denial of service condition.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Excessive Platform Resource Consumption within a Loop
The product has a loop body or loop condition that contains a control element that directly or indirectly consumes platform resources, e.g. messaging, sessions, locks, or file descriptors.
More Excessive Platform Resource Consumption within a Loop vulnerabilities (CWE-1050)
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
Third-party and government advisories
- gist.github.com/netspooky/bee2d07022f6350bb88eaa48e571d9b5Third Party Advisory
- security.netapp.com/advisory/ntap-20230420-0001/Third Party Advisory
Other references
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