[Asterisk-code-review] AST-2017-010: Fix cdr object update party b userfield cb() b... (asterisk[14.7])

[George Joseph]

George Joseph has uploaded this change for review. ( https://gerrit.asterisk.org/7130


Change subject: AST-2017-010: Fix cdr_object_update_party_b_userfield_cb() buf overrun
......................................................................

AST-2017-010: Fix cdr_object_update_party_b_userfield_cb() buf overrun

cdr_object_update_party_b_userfield_cb() could overrun the fixed buffer if
the supplied string is too long.  The long string could be supplied by
external means using the CDR(userfield) function.

This may seem reminiscent to AST-2017-001 (ASTERISK_26897) and it is.  The
earlier patch fixed the buffer overrun for Party A's userfield while this
patch fixes the same thing for Party B's userfield.

ASTERISK-27337

Change-Id: I0fa767f65ecec7e676ca465306ff9e0edbf3b652
---
M main/cdr.c
1 file changed, 4 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/30/7130/1

diff --git a/main/cdr.c b/main/cdr.c
index 06cadcd..723d92a 100644
--- a/main/cdr.c
+++ b/main/cdr.c
@@ -3255,7 +3255,8 @@
 		}
 		if (it_cdr->party_b.snapshot
 			&& !strcasecmp(it_cdr->party_b.snapshot->name, info->channel_name)) {
-			strcpy(it_cdr->party_b.userfield, info->userfield);
+			ast_copy_string(it_cdr->party_b.userfield, info->userfield,
+				sizeof(it_cdr->party_b.userfield));
 		}
 	}
 	return 0;
@@ -3278,7 +3279,8 @@
 			if (it_cdr->fn_table == &finalized_state_fn_table && it_cdr->next != NULL) {
 				continue;
 			}
-			ast_copy_string(it_cdr->party_a.userfield, userfield, AST_MAX_USER_FIELD);
+			ast_copy_string(it_cdr->party_a.userfield, userfield,
+				sizeof(it_cdr->party_a.userfield));
 		}
 		ao2_unlock(cdr);
 	}

-- 
To view, visit https://gerrit.asterisk.org/7130
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Gerrit-Project: asterisk
Gerrit-Branch: 14.7
Gerrit-MessageType: newchange
Gerrit-Change-Id: I0fa767f65ecec7e676ca465306ff9e0edbf3b652
Gerrit-Change-Number: 7130
Gerrit-PatchSet: 1
Gerrit-Owner: George Joseph <gjoseph at digium.com>
Gerrit-Reviewer: Richard Mudgett <rmudgett at digium.com>
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