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Prevent possible OOB read in DNS reply parsing

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emanuele-f 2024-08-15 13:58:47 +02:00
parent 308de20cc7
commit c4331be97a
1 changed files with 3 additions and 0 deletions
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3
app/src/main/jni/core/pcapdroid.c
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@ -657,6 +657,9 @@ static void process_dns_reply(pd_conn_t *data, pcapdroid_t *pd, const struct zdt
uint16_t addr_len = ntohs((*(uint16_t*)(reply + 8)));
reply += 10; len -= 10;
if (len < addr_len)
return;
if((rec_type == 0x1) && (addr_len == 4)) { // A record
ipver = 4;
rsp_addr.ip4 = *((u_int32_t*)reply);