Vigor2960: Improper Neutralization of Special Elements used in a Command
CVE-2024-12986 is a critical-severity improper neutralization of special elements used in a command vulnerability in Vigor2960 from DrayTek, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Vigor2960 versions: 1.5.1.3; 1.5.1.4. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 35.5% chance of exploitation within 30 days, which is in the top 1.52% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Vigor300b Firmware to 1.5.1.5 or a later version.
- Update Vigor2960 Firmware to 1.5.1.5 or a later version.
- 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 |
|---|---|---|---|
| DrayTek | Vigor2960 | 1.5.1.3; 1.5.1.4 | Not stated |
| DrayTek | Vigor300B | 1.5.1.3; 1.5.1.4 | Not stated |
| Draytek | Vigor300b Firmware | 1.5.1.3 up to, but not including, 1.5.1.5 | 1.5.1.5 |
| Draytek | Vigor2960 Firmware | 1.5.1.3 up to, but not including, 1.5.1.5 | 1.5.1.5 |
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
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 6.9 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 7.3 | High | CNA (vuldb.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 2.0 | 7.5 | High | CNA (vuldb.com) |
Official description
A vulnerability, which was classified as critical, has been found in DrayTek Vigor2960 and Vigor300B 1.5.1.3/1.5.1.4. This issue affects some unknown processing of the file /cgi-bin/mainfunction.cgi/apmcfgupptim of the component Web Management Interface. The manipulation of the argument session leads to os command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.5.1.5 is able to address this issue. It is recommended to upgrade the affected component.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in a Command
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- If possible, ensure that all external commands called from the program are statically created.
- Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.
More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?id.289379Third Party Advisory, VDB Entry
- vuldb.com/?submit.468794Third Party Advisory, VDB Entry
Technical write-ups (may include proof of concept)
- netsecfish.notion.site/Command-Injection-in-apmcfgupptim-endpoint-for-DrayTek-Gateway-Devices-1676b683e67c80b…Exploit, Third Party Advisory
Other references
- vuldb.com/?ctiid.289379Permissions Required, VDB Entry
Other vulnerabilities in Vigor2960
- 7.4 High severity
- 7.4 High severity
- 7.4 High severity
- 7.4 High severity
- 7.4 High severity
- 9.9 Critical severity
Recent Improper Neutralization of Special Elements used in a Command vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 8.0 High severity
- 9.8 Critical severity
- 7.1 High severity
- 7.1 High severity
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