Fix CVE-2017-7853:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7853
https://savannah.gnu.org/support/index.php?109265

Patch copied from upstream source repository:

https://git.savannah.gnu.org/cgit/osip.git/commit/?id=1ae06daf3b2375c34af23083394a6f010be24a45

From 1ae06daf3b2375c34af23083394a6f010be24a45 Mon Sep 17 00:00:00 2001
From: Aymeric Moizard <amoizard@gmail.com>
Date: Tue, 21 Feb 2017 17:16:26 +0100
Subject: [PATCH]  * fix bug report: sr #109265: SIP message body length
 underflow in libosip2-4.1.0    https://savannah.gnu.org/support/?109265   
 also applicable to current latest version

---
 src/osipparser2/osip_message_parse.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/osipparser2/osip_message_parse.c b/src/osipparser2/osip_message_parse.c
index 1628c60..aa35446 100644
--- a/src/osipparser2/osip_message_parse.c
+++ b/src/osipparser2/osip_message_parse.c
@@ -784,6 +784,12 @@ msg_osip_body_parse (osip_message_t * sip, const char *start_of_buf, const char
     if ('\n' == start_of_body[0] || '\r' == start_of_body[0])
       start_of_body++;
 
+    /* if message body is empty or contains a single CR/LF */
+    if (end_of_body <= start_of_body) {
+      osip_free (sep_boundary);
+      return OSIP_SYNTAXERROR;
+    }
+
     body_len = end_of_body - start_of_body;
 
     /* Skip CR before end boundary. */
-- 
2.13.1

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<tr><th>author</th><td>Daniel Khodabakhsh &lt;d.khodabakhsh@gmail.com&gt;</td><td class='right'>2024-11-09 08:38:37 -0800</td></tr>
<tr><th>committer</th><td>Ludovic Courtès &lt;ludo@gnu.org&gt;</td><td class='right'>2024-11-18 10:58:42 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/tests/build-utils.scm?id=299ddd14d8d5ccfd9d0bada8312f9b604399621c'>299ddd14d8d5ccfd9d0bada8312f9b604399621c</a> (<a href='/guix/patch/tests/build-utils.scm?id=299ddd14d8d5ccfd9d0bada8312f9b604399621c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/guix/tree/?id=299ddd14d8d5ccfd9d0bada8312f9b604399621c'>5976def77f2eace7a41ebc190cbda9f5b0319795</a> /<a href='/guix/tree/tests/build-utils.scm?id=299ddd14d8d5ccfd9d0bada8312f9b604399621c'>tests/build-utils.scm</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/guix/commit/tests/build-utils.scm?id=e526b8b11debb184929abd013b7d589c9db245fa'>e526b8b11debb184929abd013b7d589c9db245fa</a> (<a href='/guix/diff/tests/build-utils.scm?id=299ddd14d8d5ccfd9d0bada8312f9b604399621c&amp;id2=e526b8b11debb184929abd013b7d589c9db245fa'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/guix/snapshot/guix-299ddd14d8d5ccfd9d0bada8312f9b604399621c.tar.gz'>guix-299ddd14d8d5ccfd9d0bada8312f9b604399621c.tar.gz</a><br/><a href='/guix/snapshot/guix-299ddd14d8d5ccfd9d0bada8312f9b604399621c.zip'>guix-299ddd14d8d5ccfd9d0bada8312f9b604399621c.zip</a><br/></td></tr></table>
<div class='commit-subject'>linux-initrd: Export ‘file-system-modules’.</div><div class='commit-msg'>* gnu/system/linux-initrd.scm (file-system-modules): Export.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
Change-Id: I779efe280d2e3618adcae416eafc912babdce0a3
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