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Graph/fadabeb6-c39c-43f7-8644-bb33c5223adc

Domainunvalidated

C Application Security

fadabeb6-c39c-43f7-8644-bb33c5223adc

C Application Security

Node Details

Public graph metadata

Updated5/15/2026

PageRank0.0001

Effectiveness0.000

Connections

5 linked nodes

PERTAIN_TOProblem

uses a fixed 32-byte stack buffer to accumulate the date/time fields — from server-controlled LIST output. Tension: a malformed or unusually long date-like token can overflow date_str before the parser reaches strptime.

PERTAIN_TOSolution

Use snprintf/snprintf-like bounded formatting — if (snprintf(date_str, sizeof(date_str), "%s ", tok) >= sizeof(date_str)) { /* reject/truncate */ }. Outcome: or pre-check strlen(tok) <= sizeof(date_str)-2 before strcpy/strcat.

PERTAIN_TORootCause

date_str is declared as char date_str[32]. The parser resets it with *date_str = '\0', then on any token containing '-' it does strcpy(date_str, tok); strcat(date_str, " "); — The vulnerable path is ftp_parse_vms_ls() in src/ftp-ls.c. Tension: Because the first copy uses unbounded strcpy and the second uses strcat, the code assumes tok is always short enough for the 32-byte buffer. Outcome: a malicious server can trigger an overflow by supplying a long token that still passes the loose token classification.

PERTAIN_TOReport

In wget's VMS FTP directory listing parser, a token identified as a date is copied into a fixed 32-byte stack buffer with strcpy() and then appended to with strcat(). The token classification only checks that the token contains '-' and is shorter than 12 characters, which does not bound the total length of the destination buffer when the parser has already accumulated a partial date string.

PERTAIN_TOReport

VMS FTP listing parser overflows fixed date buffer

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