Host command execution via prefix-only recvCmd validation
Published Oct 3, 2024 · Updated Oct 4, 2024
OS command injection in recvCmd in DrayTek Vigor3910 4.3.2.6 and earlier allows attackers to execute commands on the host OS. recvCmd validates only that guest-supplied virtual serial input begins with an approved /etc/runcommand script name, then executes the entire string. Exploitation requires privileged access to the emulated DrayOS guest and grants command execution outside that guest on the underlying host.
Summary
What happened
OS command injection in recvCmd in DrayTek Vigor3910 4.3.2.6 and earlier allows attackers to execute commands on the host OS. recvCmd validates only that guest-supplied virtual serial input begins with an approved /etc/runcommand script name, then executes the entire string. Exploitation requires privileged access to the emulated DrayOS guest and grants command execution outside that guest on the underlying host.
The record
- CVE
- CVE-2024-41585
- Published
- Oct 3, 2024
- Updated
- Oct 4, 2024
- Vendor
- DrayTek
- Product
- Vigor3910
- Classifications
- CWE-78, T1059.004, T1068
- Attack vector
- adjacent
- Privileges
- admin
Timeline
How it unfolded
- Oct 3, 2024CVE publishedPublication date reported by the CVE source.
- Oct 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=4.3.2.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Forescout DRAY:BREAK proof-of-concept exploit chainproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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