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-rw-r--r--extensions/libipt_esp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/extensions/libipt_esp.c b/extensions/libipt_esp.c
index 4abfba3..21e912b 100644
--- a/extensions/libipt_esp.c
+++ b/extensions/libipt_esp.c
@@ -62,6 +62,9 @@ parse_esp_spis(const char *spistring, u_int32_t *spis)
spis[0] = buffer[0] ? parse_esp_spi(buffer) : 0;
spis[1] = cp[0] ? parse_esp_spi(cp) : 0xFFFFFFFF;
+ if (spis[0] > spis[1])
+ exit_error(PARAMETER_PROBLEM,
+ "Invalid ESP spi range: %s", spistring);
}
free(buffer);
}