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CVE-2023-38951 is an authenticated arbitrary file creation and overwrite vulnerability in ZKTeco BioTime 8.5.5 through 9.x before 9.0.1 (build 20240617.19506). The flaw is exposed through the /base/sftpsetting/ endpoints, where attacker-controlled input in the Username field is subject to path traversal and the SSH Key field is not properly sanitized. By submitting crafted requests, an authenticated attacker can traverse directories and write attacker-controlled content to arbitrary server-side files. Because the vulnerable functionality permits overwriting existing files as well as creating new ones, an attacker may be able to replace security-relevant or executable files. In documented exploitation scenarios, overwriting specific files can result in arbitrary code execution under the NT AUTHORITY\SYSTEM security context.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An authenticated arbitrary file write vulnerability in ZKTeco BioTime via path traversal and insufficient input sanitization in /base/sftpsetting/ endpoints, potentially leading to code execution with NT AUTHORITY\SYSTEM privileges.
One of a set of Biotime product vulnerabilities used by Lemon Sandstorm for attempted re-entry/persistence against a Middle East CNI target after containment actions.
A known vulnerability in Biotime that was leveraged in attempted re-infiltration of the victim network after prior access was removed.
A known vulnerability in ZKTeco ZKBioTime that was part of a publicly available exploit chain used by the adversary to regain access to the victim environment after remediation.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.