Module: kamailio Branch: 4.3 Commit: 18cd34781d2bdda9c19314c0494f6a655dbe6089 URL: https://github.com/kamailio/kamailio/commit/18cd34781d2bdda9c19314c0494f6a65...

Author: Daniel-Constantin Mierla miconda@gmail.com Committer: Daniel-Constantin Mierla miconda@gmail.com Date: 2016-02-12T18:06:57+01:00

seas: safety check for target buffer size before copying message in encode_msg()

- avoid buffer overflow for large SIP messages - reported by Stelios Tsampas

(cherry picked from commit f50c9c853e7809810099c970780c30b0765b0643)

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Modified: modules/seas/encode_msg.c

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Diff: https://github.com/kamailio/kamailio/commit/18cd34781d2bdda9c19314c0494f6a65... Patch: https://github.com/kamailio/kamailio/commit/18cd34781d2bdda9c19314c0494f6a65...

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diff --git a/modules/seas/encode_msg.c b/modules/seas/encode_msg.c index 06d31a3..e56b5fb 100644 --- a/modules/seas/encode_msg.c +++ b/modules/seas/encode_msg.c @@ -158,6 +158,7 @@ int encode_msg(struct sip_msg *msg,char *payload,int len)

if(len < MAX_ENCODED_MSG + MAX_MESSAGE_LEN) return -1; + if(parse_headers(msg,HDR_EOH_F,0)<0){ myerror="in parse_headers"; goto error; @@ -266,6 +267,11 @@ int encode_msg(struct sip_msg *msg,char *payload,int len) /*j+=k;*/ /*pkg_free(payload2);*/ /*now we copy the actual message after the headers-meta-section*/ + + if(len < j + msg->len + 1) { + LM_ERR("not enough space to encode sip message\n"); + return -1; + } memcpy(&payload[j],msg->buf,msg->len); LM_DBG("msglen = %d,msg starts at %d\n",msg->len,j); j=htons(j);