mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-26 06:18:07 -05:00
73 lines
2 KiB
Diff
73 lines
2 KiB
Diff
|
Fix CVE-2016-6328:
|
||
|
|
|
||
|
|
https://bugzilla.redhat.com/show_bug.cgi?id=1366239
|
||
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6328
|
||
|
|
|
||
|
|
Patch copied from upstream source repository:
|
||
|
|
|
||
|
|
https://github.com/libexif/libexif/commit/41bd04234b104312f54d25822f68738ba8d7133d
|
||
|
|
|
||
|
|
From 41bd04234b104312f54d25822f68738ba8d7133d Mon Sep 17 00:00:00 2001
|
||
|
|
From: Marcus Meissner <marcus@jet.franken.de>
|
||
|
|
Date: Tue, 25 Jul 2017 23:44:44 +0200
|
||
|
|
Subject: [PATCH] fixes some (not all) buffer overreads during decoding pentax
|
||
|
|
makernote entries.
|
||
|
|
|
||
|
|
This should fix:
|
||
|
|
https://sourceforge.net/p/libexif/bugs/125/ CVE-2016-6328
|
||
|
|
---
|
||
|
|
libexif/pentax/mnote-pentax-entry.c | 16 +++++++++++++---
|
||
|
|
1 file changed, 13 insertions(+), 3 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/libexif/pentax/mnote-pentax-entry.c b/libexif/pentax/mnote-pentax-entry.c
|
||
|
|
index d03d159..ea0429a 100644
|
||
|
|
--- a/libexif/pentax/mnote-pentax-entry.c
|
||
|
|
+++ b/libexif/pentax/mnote-pentax-entry.c
|
||
|
|
@@ -425,24 +425,34 @@ mnote_pentax_entry_get_value (MnotePentaxEntry *entry,
|
||
|
|
case EXIF_FORMAT_SHORT:
|
||
|
|
{
|
||
|
|
const unsigned char *data = entry->data;
|
||
|
|
- size_t k, len = strlen(val);
|
||
|
|
+ size_t k, len = strlen(val), sizeleft;
|
||
|
|
+
|
||
|
|
+ sizeleft = entry->size;
|
||
|
|
for(k=0; k<entry->components; k++) {
|
||
|
|
+ if (sizeleft < 2)
|
||
|
|
+ break;
|
||
|
|
vs = exif_get_short (data, entry->order);
|
||
|
|
snprintf (val+len, maxlen-len, "%i ", vs);
|
||
|
|
len = strlen(val);
|
||
|
|
data += 2;
|
||
|
|
+ sizeleft -= 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case EXIF_FORMAT_LONG:
|
||
|
|
{
|
||
|
|
const unsigned char *data = entry->data;
|
||
|
|
- size_t k, len = strlen(val);
|
||
|
|
+ size_t k, len = strlen(val), sizeleft;
|
||
|
|
+
|
||
|
|
+ sizeleft = entry->size;
|
||
|
|
for(k=0; k<entry->components; k++) {
|
||
|
|
+ if (sizeleft < 4)
|
||
|
|
+ break;
|
||
|
|
vl = exif_get_long (data, entry->order);
|
||
|
|
snprintf (val+len, maxlen-len, "%li", (long int) vl);
|
||
|
|
len = strlen(val);
|
||
|
|
data += 4;
|
||
|
|
+ sizeleft -= 4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
@@ -455,5 +465,5 @@ mnote_pentax_entry_get_value (MnotePentaxEntry *entry,
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
- return (val);
|
||
|
|
+ return val;
|
||
|
|
}
|
||
|
|
--
|
||
|
|
2.16.0
|
||
|
|
|