CVE-2021-3317Klog Server OS Command Injection
KLog Server through 2.4.1 allows authenticated command injection.
Published Jan 26, 2021 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2021-3317 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Klog Server (Klogserver).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 41% probability of exploitation in the next 30 days.
- Fixed versions are available, including Klog Server <=2.4.1, Klog Server 2.4.1.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
41%
Higher than 98.6% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
40/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
2
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Description
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Klog ServerKlogserver | See advisory | 2.4.1 |
Patched Releases
Klog Server
<=2.4.1
Timeline
Publicly disclosed
Jan 26, 2021
Last updated
Nov 21, 2024
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
FAQ
Common Questions.
KLog Server through 2.4.1 allows authenticated command injection.
Affected: Klog Server (Klogserver). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Klog Server <=2.4.1, Klog Server 2.4.1.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2021-3317 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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