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From: Idan Freiberg
Subject: sesman: scpv0, accept variable length data fields
Origin: https://github.com/neutrinolabs/xrdp/commit/ebd0510a7d4dab906b6e01570205dfa530d1f7bf.diff
Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=882463
--- a/sesman/libscp/libscp_v0.c
+++ b/sesman/libscp/libscp_v0.c
@@ -157,7 +157,7 @@ scp_v0s_accept(struct SCP_CONNECTION *c,
struct SCP_SESSION *session = 0;
tui16 sz;
tui32 code = 0;
- char buf[257];
+ char *buf = 0;
if (!skipVchk)
{
@@ -222,27 +222,31 @@ scp_v0s_accept(struct SCP_CONNECTION *c,
/* reading username */
in_uint16_be(c->in_s, sz);
- buf[sz] = '\0';
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
-
+ buf[sz] = '\0';
if (0 != scp_session_set_username(session, buf))
{
scp_session_destroy(session);
log_message(LOG_LEVEL_WARNING, "[v0:%d] connection aborted: error setting username", __LINE__);
+ g_free(buf);
return SCP_SERVER_STATE_INTERNAL_ERR;
}
+ g_free(buf);
/* reading password */
in_uint16_be(c->in_s, sz);
- buf[sz] = '\0';
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
-
+ buf[sz] = '\0';
if (0 != scp_session_set_password(session, buf))
{
scp_session_destroy(session);
log_message(LOG_LEVEL_WARNING, "[v0:%d] connection aborted: error setting password", __LINE__);
+ g_free(buf);
return SCP_SERVER_STATE_INTERNAL_ERR;
}
+ g_free(buf);
/* width */
in_uint16_be(c->in_s, sz);
@@ -268,9 +272,11 @@ scp_v0s_accept(struct SCP_CONNECTION *c,
if (sz > 0)
{
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
buf[sz] = '\0';
scp_session_set_domain(session, buf);
+ g_free(buf);
}
}
@@ -281,9 +287,11 @@ scp_v0s_accept(struct SCP_CONNECTION *c,
if (sz > 0)
{
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
buf[sz] = '\0';
scp_session_set_program(session, buf);
+ g_free(buf);
}
}
@@ -294,9 +302,11 @@ scp_v0s_accept(struct SCP_CONNECTION *c,
if (sz > 0)
{
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
buf[sz] = '\0';
scp_session_set_directory(session, buf);
+ g_free(buf);
}
}
@@ -307,9 +317,11 @@ scp_v0s_accept(struct SCP_CONNECTION *c,
if (sz > 0)
{
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
buf[sz] = '\0';
scp_session_set_client_ip(session, buf);
+ g_free(buf);
}
}
}
@@ -328,29 +340,35 @@ scp_v0s_accept(struct SCP_CONNECTION *c,
scp_session_set_type(session, SCP_GW_AUTHENTICATION);
/* reading username */
in_uint16_be(c->in_s, sz);
- buf[sz] = '\0';
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
+ buf[sz] = '\0';
/* g_writeln("Received user name: %s",buf); */
if (0 != scp_session_set_username(session, buf))
{
scp_session_destroy(session);
/* until syslog merge log_message(s_log, LOG_LEVEL_WARNING, "[v0:%d] connection aborted: error setting username", __LINE__);*/
+ g_free(buf);
return SCP_SERVER_STATE_INTERNAL_ERR;
}
+ g_free(buf);
/* reading password */
in_uint16_be(c->in_s, sz);
- buf[sz] = '\0';
+ buf = g_new0(char, sz + 1);
in_uint8a(c->in_s, buf, sz);
+ buf[sz] = '\0';
/* g_writeln("Received password: %s",buf); */
if (0 != scp_session_set_password(session, buf))
{
scp_session_destroy(session);
/* until syslog merge log_message(s_log, LOG_LEVEL_WARNING, "[v0:%d] connection aborted: error setting password", __LINE__); */
+ g_free(buf);
return SCP_SERVER_STATE_INTERNAL_ERR;
}
+ g_free(buf);
}
else
{
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