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don't allow null characters in authorized_keys

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This commit is contained in:
Matt Johnston 2018-03-07 22:16:21 +08:00
parent ed4c38ba46
commit 27828c742c
1 changed files with 6 additions and 1 deletions
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7
svr-authpubkey.c
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@ -201,7 +201,12 @@ static int checkpubkey_line(buffer* line, int line_num, const char* filename,
if (line->len < MIN_AUTHKEYS_LINE || line->len > MAX_AUTHKEYS_LINE) {
TRACE(("checkpubkey_line: bad line length %d", line->len))
return DROPBEAR_FAILURE;
goto out;
}
if (memchr(line->data, 0x0, line->len) != NULL) {
TRACE(("checkpubkey_line: bad line has null char"))
goto out;
}
/* compare the algorithm. +3 so we have enough bytes to read a space and some base64 characters too. */