1
0
mirror of https://github.com/moparisthebest/curl synced 2024-12-23 16:48:49 -05:00

smtp: check for and bail out on too short EHLO response

Otherwise, a three byte response would make the smtp_state_ehlo_resp()
function misbehave.

Credit to OSS-Fuzz
Bug: https://crbug.com/oss-fuzz/16918

Assisted-by: Max Dymond

Closes #4287
This commit is contained in:
Daniel Stenberg 2019-09-02 23:04:26 +02:00
parent 198b73d12c
commit 4d0306c698
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2

View File

@ -714,7 +714,7 @@ static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
result = CURLE_REMOTE_ACCESS_DENIED;
}
}
else {
else if(len >= 4) {
line += 4;
len -= 4;
@ -785,6 +785,10 @@ static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
result = smtp_perform_authentication(conn);
}
}
else {
failf(data, "Unexpectedly short EHLO response");
result = CURLE_WEIRD_SERVER_REPLY;
}
return result;
}