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2 vulnerabilities found for LightFTP by hfiref0x
CVE-2026-70637 (GCVE-0-2026-70637)
Vulnerability from cvelistv5 – Published: 2026-08-06 14:15 – Updated: 2026-11-08 14:08 X_Open Source
VLAI
EPSS
VEX
Title
LightFTP 2.4 Data Race Condition via ABOR Command in ftpserv.c
Summary
LightFTP through 2.4 contains multiple data race vulnerabilities in ftpserv.c that allow anonymous attackers to cause undefined behavior by issuing LIST followed by ABOR commands without authentication. The control thread closes data_socket and file_fd descriptors while worker threads concurrently operate on the same fields in worker_thread_cleanup, allowing stale file descriptors to be reassigned by the OS and subsequently used by worker threads on unrelated resources, resulting in potential denial of service.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 17:23 UTC
CWE
- CWE-820 - Missing Synchronization
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/hfiref0x/LightFTP/issues/75 | technical-descriptionexploitissue-tracking |
| https://www.vulncheck.com/advisories/lightftp-dat… | third-party-advisory |
Impacted products
Date Public
2026-06-22 00:00
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CVE-2026-67607 (GCVE-0-2026-67607)
Vulnerability from cvelistv5 – Published: 2026-07-31 15:59 – Updated: 2026-08-14 16:50 X_Open Source
VLAI
EPSS
VEX
Title
LightFTP 2.3.1 Race Condition DoS via worker_thread_cleanup
Summary
LightFTP 2.3.1 contains a residual race condition vulnerability (an incomplete fix for CVE-2024-11144) in the worker_thread_cleanup() function of ftpserv.c that allows remote unauthenticated attackers to destabilize or crash the daemon by triggering unsynchronized access to shared per-connection state without holding the required mutex lock. Attackers can send a data-transfer command such as LIST followed immediately by ABOR to exploit the missing synchronization on shared context and detached thread id reuse, resulting in daemon destabilization or crash which can lead to a denial of service. The 2.3.1 patch only narrowed the timing window (an extra re-check and reordered cleanup), it never added the missing lock, so the underlying race remains.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:17 UTC
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/zeroscience/tuktam#real-world-… | technical-description |
| https://www.vulncheck.com/advisories/lightftp-rac… | third-party-advisory |
Impacted products
Date Public
2026-07-30 00:00
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