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authorStephen Gallagher <sgallagh@redhat.com>2011-11-14 11:31:37 -0500
committerStephen Gallagher <sgallagh@redhat.com>2011-11-18 12:18:33 -0500
commit872f2d32d979a1dd2145667487f170fec8b5189a (patch)
tree44a6f75159cb3c9b3f5da4048d1d4bd343de89a1 /src
parent37a76cff2478d8be3d11ccb7ff42d9d863f1839e (diff)
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RESPONDER: Ensure that all input strings are valid UTF-8
Diffstat (limited to 'src')
-rw-r--r--src/external/libunistring.m45
-rw-r--r--src/responder/common/responder.h2
-rw-r--r--src/responder/common/responder_common.c9
-rw-r--r--src/responder/nss/nsssrv_cmd.c21
-rw-r--r--src/responder/nss/nsssrv_netgroup.c7
-rw-r--r--src/responder/pam/pamsrv_cmd.c5
6 files changed, 49 insertions, 0 deletions
diff --git a/src/external/libunistring.m4 b/src/external/libunistring.m4
index 69c54fe3..18ea3e62 100644
--- a/src/external/libunistring.m4
+++ b/src/external/libunistring.m4
@@ -6,4 +6,9 @@ AC_CHECK_HEADERS(unistr.h,
AC_CHECK_HEADERS(unicase.h,
[AC_CHECK_LIB([unistring], [u8_casecmp], [ UNISTRING_LIBS="-lunistring" ], [AC_MSG_ERROR([No usable libunistring library found])])],
[AC_MSG_ERROR([libunistring header files are not installed])]
+)
+
+AC_CHECK_HEADERS(unistr.h,
+ [AC_CHECK_LIB([unistring], [u8_check], [ UNISTRING_LIBS="-lunistring" ], [AC_MSG_ERROR([No usable libunistring library found])])],
+ [AC_MSG_ERROR([libunistring header files are not installed])]
) \ No newline at end of file
diff --git a/src/responder/common/responder.h b/src/responder/common/responder.h
index 321cedda..1b39fdd5 100644
--- a/src/responder/common/responder.h
+++ b/src/responder/common/responder.h
@@ -174,4 +174,6 @@ int sss_dp_send_acct_req(struct resp_ctx *rctx, TALLOC_CTX *callback_memctx,
int responder_logrotate(DBusMessage *message,
struct sbus_connection *conn);
+bool sss_utf8_check(const uint8_t *s, size_t n);
+
#endif /* __SSS_RESPONDER_H__ */
diff --git a/src/responder/common/responder_common.c b/src/responder/common/responder_common.c
index 719f2464..f97ec06f 100644
--- a/src/responder/common/responder_common.c
+++ b/src/responder/common/responder_common.c
@@ -32,6 +32,7 @@
#include <sys/time.h>
#include <errno.h>
#include <popt.h>
+#include <unistr.h>
#include "util/util.h"
#include "db/sysdb.h"
#include "confdb/confdb.h"
@@ -627,3 +628,11 @@ int responder_logrotate(DBusMessage *message,
return monitor_common_pong(message, conn);
}
+
+bool sss_utf8_check(const uint8_t *s, size_t n)
+{
+ if (u8_check(s, n) == NULL) {
+ return true;
+ }
+ return false;
+}
diff --git a/src/responder/nss/nsssrv_cmd.c b/src/responder/nss/nsssrv_cmd.c
index 8f4cb440..a37bd766 100644
--- a/src/responder/nss/nsssrv_cmd.c
+++ b/src/responder/nss/nsssrv_cmd.c
@@ -873,6 +873,13 @@ static int nss_cmd_getpwnam(struct cli_ctx *cctx)
ret = EINVAL;
goto done;
}
+
+ /* If the body isn't valid UTF-8, fail */
+ if (!sss_utf8_check(body, blen)) {
+ ret = EINVAL;
+ goto done;
+ }
+
rawname = (const char *)body;
domname = NULL;
@@ -2140,6 +2147,13 @@ static int nss_cmd_getgrnam(struct cli_ctx *cctx)
ret = EINVAL;
goto done;
}
+
+ /* If the body isn't valid UTF-8, fail */
+ if (!sss_utf8_check(body, blen)) {
+ ret = EINVAL;
+ goto done;
+ }
+
rawname = (const char *)body;
domname = NULL;
@@ -3180,6 +3194,13 @@ static int nss_cmd_initgroups(struct cli_ctx *cctx)
ret = EINVAL;
goto done;
}
+
+ /* If the body isn't valid UTF-8, fail */
+ if (!sss_utf8_check(body, blen)) {
+ ret = EINVAL;
+ goto done;
+ }
+
rawname = (const char *)body;
domname = NULL;
diff --git a/src/responder/nss/nsssrv_netgroup.c b/src/responder/nss/nsssrv_netgroup.c
index cd0ba723..7d5665d4 100644
--- a/src/responder/nss/nsssrv_netgroup.c
+++ b/src/responder/nss/nsssrv_netgroup.c
@@ -113,6 +113,13 @@ int nss_cmd_setnetgrent(struct cli_ctx *client)
ret = EINVAL;
goto done;
}
+
+ /* If the body isn't valid UTF-8, fail */
+ if (!sss_utf8_check(body, blen)) {
+ ret = EINVAL;
+ goto done;
+ }
+
rawname = (const char *)body;
req = setnetgrent_send(cmdctx, rawname, cmdctx);
diff --git a/src/responder/pam/pamsrv_cmd.c b/src/responder/pam/pamsrv_cmd.c
index 1d2a2a58..18ba3fdf 100644
--- a/src/responder/pam/pamsrv_cmd.c
+++ b/src/responder/pam/pamsrv_cmd.c
@@ -70,6 +70,11 @@ static int extract_string(char **var, size_t size, uint8_t *body, size_t blen,
if (str[size-1]!='\0') return EINVAL;
+ /* If the string isn't valid UTF-8, fail */
+ if (!sss_utf8_check(str, size)) {
+ return EINVAL;
+ }
+
*c += size;
*var = (char *) str;