socks: Make SafeSocks refuse SOCKS4 and accept SOCKS4a

The logic was inverted. Introduced in commit
9155e08450.

This was reported through our bug bounty program on H1. It fixes the
TROVE-2022-002.

Fixes #40730

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2022-12-12 10:02:07 -05:00
parent b117ce48db
commit a282145b36
2 changed files with 6 additions and 1 deletions

5
changes/ticket40730 Normal file
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@ -0,0 +1,5 @@
o Major bugfixes (TROVE-2022-002, client):
- The SafeSocks option had its logic inverted for SOCKS4 and SOCKS4a. It
would let the unsafe SOCKS4 pass but not the safe SOCKS4a one. This is
TROVE-2022-002 which was reported on Hackerone by "cojabo". Fixes bug
40730; bugfix on 0.3.5.1-alpha.

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@ -233,7 +233,7 @@ static socks_result_t
process_socks4_request(const socks_request_t *req, int is_socks4a, process_socks4_request(const socks_request_t *req, int is_socks4a,
int log_sockstype, int safe_socks) int log_sockstype, int safe_socks)
{ {
if (is_socks4a && !addressmap_have_mapping(req->address, 0)) { if (!is_socks4a && !addressmap_have_mapping(req->address, 0)) {
log_unsafe_socks_warning(4, req->address, req->port, safe_socks); log_unsafe_socks_warning(4, req->address, req->port, safe_socks);
if (safe_socks) if (safe_socks)