37 lines
1.3 KiB
Diff
37 lines
1.3 KiB
Diff
|
From bd150334fb4084f5555a6be26b015a0671cb5b74 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Kamil Dudka <kdudka@redhat.com>
|
||
|
|
Date: Tue, 22 Sep 2015 18:52:23 +0200
|
||
|
|
Subject: [PATCH] extract: prevent unsigned overflow on invalid input
|
||
|
|
|
||
|
|
Suggested-by: Stefan Cornelius
|
||
|
|
---
|
||
|
|
extract.c | 11 ++++++++++-
|
||
|
|
1 file changed, 10 insertions(+), 1 deletion(-)
|
||
|
|
|
||
|
|
diff --git a/extract.c b/extract.c
|
||
|
|
index 29db027..b9ae667 100644
|
||
|
|
--- a/extract.c
|
||
|
|
+++ b/extract.c
|
||
|
|
@@ -1257,8 +1257,17 @@ static int extract_or_test_entrylist(__G__ numchunk,
|
||
|
|
if (G.lrec.compression_method == STORED) {
|
||
|
|
zusz_t csiz_decrypted = G.lrec.csize;
|
||
|
|
|
||
|
|
- if (G.pInfo->encrypted)
|
||
|
|
+ if (G.pInfo->encrypted) {
|
||
|
|
+ if (csiz_decrypted <= 12) {
|
||
|
|
+ /* handle the error now to prevent unsigned overflow */
|
||
|
|
+ Info(slide, 0x401, ((char *)slide,
|
||
|
|
+ LoadFarStringSmall(ErrUnzipNoFile),
|
||
|
|
+ LoadFarString(InvalidComprData),
|
||
|
|
+ LoadFarStringSmall2(Inflate)));
|
||
|
|
+ return PK_ERR;
|
||
|
|
+ }
|
||
|
|
csiz_decrypted -= 12;
|
||
|
|
+ }
|
||
|
|
if (G.lrec.ucsize != csiz_decrypted) {
|
||
|
|
Info(slide, 0x401, ((char *)slide,
|
||
|
|
LoadFarStringSmall2(WrnStorUCSizCSizDiff),
|
||
|
|
--
|
||
|
|
2.5.2
|
||
|
|
|