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From c5f258de76dbb67fb64beab39a99e5c5711f41fe Mon Sep 17 00:00:00 2001
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From: Jouni Malinen <jouni@qca.qualcomm.com>
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Date: Mon, 6 Oct 2014 17:25:52 +0300
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Subject: [PATCH 2/2] wpa_cli: Use os_exec() for action script execution
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Use os_exec() to run the action script operations to avoid undesired
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command line processing for control interface event strings. Previously,
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it could have been possible for some of the event strings to include
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unsanitized data which is not suitable for system() use. (CVE-2014-3686)
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Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
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---
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wpa_supplicant/wpa_cli.c | 25 ++++++++-----------------
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1 file changed, 8 insertions(+), 17 deletions(-)
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diff --git a/wpa_supplicant/wpa_cli.c b/wpa_supplicant/wpa_cli.c
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index 18b9b77..fe30b41 100644
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--- a/wpa_supplicant/wpa_cli.c
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+++ b/wpa_supplicant/wpa_cli.c
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@@ -3155,36 +3155,27 @@ static int str_match(const char *a, const char *b)
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return os_strncmp(a, b, os_strlen(b)) == 0;
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}
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static int wpa_cli_exec(const char *program, const char *arg1,
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const char *arg2)
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{
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- char *cmd;
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+ char *arg;
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size_t len;
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int res;
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- int ret = 0;
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- len = os_strlen(program) + os_strlen(arg1) + os_strlen(arg2) + 3;
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- cmd = os_malloc(len);
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- if (cmd == NULL)
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+ len = os_strlen(arg1) + os_strlen(arg2) + 2;
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+ arg = os_malloc(len);
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+ if (arg == NULL)
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return -1;
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- res = os_snprintf(cmd, len, "%s %s %s", program, arg1, arg2);
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- if (res < 0 || (size_t) res >= len) {
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- os_free(cmd);
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- return -1;
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- }
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- cmd[len - 1] = '\0';
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-#ifndef _WIN32_WCE
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- if (system(cmd) < 0)
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- ret = -1;
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-#endif /* _WIN32_WCE */
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- os_free(cmd);
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+ os_snprintf(arg, len, "%s %s", arg1, arg2);
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+ res = os_exec(program, arg, 1);
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+ os_free(arg);
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- return ret;
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+ return res;
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}
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static void wpa_cli_action_process(const char *msg)
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{
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const char *pos;
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char *copy = NULL, *id, *pos2;
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--
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1.9.3
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