Vigor2620 Firmware: Inadequate Encryption Strength
CVE-2024-41594 is a high-severity inadequate encryption strength vulnerability in Vigor2620 Firmware from DrayTek, 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. There is no confirmed exploitation so far. EPSS estimates a 0.27% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Vigor2915 Firmware to 4.4.5.3 or a later version.
- Update Vigor2866 Firmware to 4.4.5.2 or a later version.
- Update Vigor2766 Firmware to 4.4.5.3 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 | Vigor2620 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2915 Firmware | before 4.4.5.3 | 4.4.5.3 |
| Draytek | Vigor2866 Firmware | before 4.4.5.2 | 4.4.5.2 |
| Draytek | Vigor2766 Firmware | before 4.4.5.3 | 4.4.5.3 |
| Draytek | Vigor2865 Firmware | before 4.4.5.2 | 4.4.5.2 |
| Draytek | Vigor2765 Firmware | before 4.4.5.3 | 4.4.5.3 |
| Draytek | Vigor2763 Firmware | before 4.4.5.3 | 4.4.5.3 |
| Draytek | Vigor2135 Firmware | before 4.4.5.3 | 4.4.5.3 |
| Draytek | Vigor166 Firmware | before 4.2.7 | 4.2.7 |
| Draytek | Vigor1000b Firmware | before 4.3.2.8; 4.4.0.0 up to, but not including, 4.4.3.1 | 4.3.2.8, 4.4.3.1 |
| Draytek | Vigor165 Firmware | before 4.2.7 | 4.2.7 |
| Draytek | Vigor3910 Firmware | before 4.3.2.8; 4.4.0.0 up to, but not including, 4.4.3.1 | 4.3.2.8, 4.4.3.1 |
| Draytek | Vigor2962 Firmware | before 4.3.2.8; 4.4.0.0 up to, but not including, 4.4.3.1 | 4.3.2.8, 4.4.3.1 |
| Draytek | Vigor3912 Firmware | before 4.3.6.1 | 4.3.6.1 |
| Draytek | Vigorlte200 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2133 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2762 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2832 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2860 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2862 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2925 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2926 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor2952 Firmware | Not specified in the record | Not stated |
| Draytek | Vigor3220 Firmware | Not specified in the record | Not stated |
Version data comes from NVD's product matching. 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. 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
An issue in DrayTek Vigor310 devices through 4.3.2.6 allows an attacker to obtain sensitive information because the httpd server of the Vigor management UI uses a static string for seeding the PRNG of OpenSSL.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Inadequate Encryption Strength
The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.
How developers prevent this class of flaw
- Use an encryption scheme that is currently considered to be strong by experts in the field.
More Inadequate Encryption Strength vulnerabilities (CWE-326)
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
Patches and release notes
- forescout.com/resources/draybreak-draytek-research/Mitigation, Technical Description, Third Party Advisory
Other vulnerabilities in Vigor2620 Firmware
- 9.8 Critical severity
- 9.8 Critical severity
- 8.4 High severity
- 8.8 High severity
- 7.5 High severity
- 8.8 High severity
Recent Inadequate Encryption Strength vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 8.1 High severity
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