OESA-2026-4660: tftp security update
TFTP which is the abbreviation of Trivial File Fransfer Protocol enables users to transfer files between local host and remote machine. This package tftp is a client implementing TFTP. Security Fix(es):
A flaw was found in tftp-hpa. When the in.tftpd remap engine processes an inverse remap rule that also aborts with a non-empty custom error message, it can pass invalid match offsets to the genmatchstring() function. This leads to out-of-bounds read/write operations. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted request, causing the daemon to crash and resulting in a denial of service.(CVE-2026-85234)
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
openeuler/tftpto a version that resolves this vulnerability.Fixed in 5.2-33.oe2403sp3
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
Systems running the affected tftp-hpa server daemon, in.tftpd, are exposed. The issue is reachable remotely through specially crafted TFTP requests.
Does an attacker need credentials or user interaction to exploit it?
No. Exploitation is described as remote and unauthenticated, and does not require user interaction.
What is the practical impact of exploitation?
A successful exploit can cause out-of-bounds read/write operations in the daemon and crash it, resulting in denial of service.