Integer underflow in uftpd - #VU150001
Published: September 15, 2026
Vulnerability identifier: #VU150001
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer underflow in parse_RWRQ when processing a 2-byte RRQ or WRQ UDP packet. A remote attacker can send a 2-byte RRQ or WRQ UDP packet to cause a denial of service.
Affected software
uftpd
Remediation
Install security update from vendor's website.
uftpd - update to 2.17