mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-29 07:42:23 -05:00
090456dacb
* gnu/packages/patches/ytnef-CVE-2021-3403.patch, gnu/packages/patches/ytnef-CVE-2021-3404.patch: New patches. * gnu/local.mk (dist_patch_DATA): Register them. * gnu/packages/mail.scm (ytnef): Apply them.
32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
From f2380a53fb84d370eaf6e6c3473062c54c57fac7 Mon Sep 17 00:00:00 2001
|
|
From: Oliver Giles <ohw.giles@gmail.com>
|
|
Date: Mon, 1 Feb 2021 10:12:16 +1300
|
|
Subject: [PATCH] Prevent potential double-free in TNEFSubjectHandler
|
|
|
|
If TNEFSubjectHandler is called multiple times, but the last time
|
|
failed due to the PREALLOCCHECK, the subject.data member will be
|
|
a freed, but invalid pointer. To prevent a double-free next time
|
|
TNEFSubjectHandler is entered, set it to zero after freeing.
|
|
|
|
Resolves: #85
|
|
Reported-by: jasperla
|
|
---
|
|
lib/ytnef.c | 4 +++-
|
|
1 file changed, 3 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/lib/ytnef.c b/lib/ytnef.c
|
|
index b148719..b06c807 100644
|
|
--- a/lib/ytnef.c
|
|
+++ b/lib/ytnef.c
|
|
@@ -301,8 +301,10 @@ int TNEFFromHandler STD_ARGLIST {
|
|
}
|
|
// -----------------------------------------------------------------------------
|
|
int TNEFSubjectHandler STD_ARGLIST {
|
|
- if (TNEF->subject.data)
|
|
+ if (TNEF->subject.data) {
|
|
free(TNEF->subject.data);
|
|
+ TNEF->subject.data = NULL;
|
|
+ }
|
|
|
|
PREALLOCCHECK(size, 100);
|
|
TNEF->subject.data = calloc(size+1, sizeof(BYTE));
|