tftp-hpa 5.4 before 6.0 contains an out-of-bounds read vulnerability in rewrite_string() in tftpd/remap.c that walks heap memory during jump label searches. Unauthenticated remote attackers can send read or write requests whose filename matches a remap jump rule to crash the forked in.tftpd request handler.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/
disclosure@vulncheck.com
https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/commit/?id=6735086fb64…
disclosure@vulncheck.com
https://git.kernel.org/pub/scm/network/tftp/tftp-hpa.git/tree/tftpd/remap.c?h=t…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/tftp-hpa-5.4-before-6.0-out-of-bounds-read…
disclosure@vulncheck.com