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unzip: CVE-2015-7696, CVE-2015-7697

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CVE-2015-7696: Fixes a heap overflow triggered by unzipping a file with password
CVE-2015-7697: Fixes a denial of service with a file that never finishes unzipping

References:
http://www.openwall.com/lists/oss-security/2015/10/11/5
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7696
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7697

(From OE-Core rev: 9c841157f8ecd3221702c4675a4145f586617780)

Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Tudor Florea 2015-12-14 13:24:10 +01:00 committed by Richard Purdie
parent aa10f103e1
commit 3beebd9447
3 changed files with 71 additions and 0 deletions
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38
meta/recipes-extended/unzip/unzip/CVE-2015-7696.patch Normal file
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@ -0,0 +1,38 @@
Upstream-Status: Backport
Signed-off-by: Tudor Florea <tudor.flore@enea.com>
From 68efed87fabddd450c08f3112f62a73f61d493c9 Mon Sep 17 00:00:00 2001
From: Petr Stodulka <pstodulk@redhat.com>
Date: Mon, 14 Sep 2015 18:23:17 +0200
Subject: [PATCH 1/2] upstream fix for heap overflow
https://bugzilla.redhat.com/attachment.cgi?id=1073002
---
crypt.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/crypt.c b/crypt.c
index 784e411..a8975f2 100644
--- a/crypt.c
+++ b/crypt.c
@@ -465,7 +465,17 @@ int decrypt(__G__ passwrd)
GLOBAL(pInfo->encrypted) = FALSE;
defer_leftover_input(__G);
for (n = 0; n < RAND_HEAD_LEN; n++) {
- b = NEXTBYTE;
+ /* 2012-11-23 SMS. (OUSPG report.)
+ * Quit early if compressed size < HEAD_LEN. The resulting
+ * error message ("unable to get password") could be improved,
+ * but it's better than trying to read nonexistent data, and
+ * then continuing with a negative G.csize. (See
+ * fileio.c:readbyte()).
+ */
+ if ((b = NEXTBYTE) == (ush)EOF)
+ {
+ return PK_ERR;
+ }
h[n] = (uch)b;
Trace((stdout, " (%02x)", h[n]));
}
--
2.4.6

31
meta/recipes-extended/unzip/unzip/CVE-2015-7697.patch Normal file
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@ -0,0 +1,31 @@
Upstream-Status: Backport
Signed-off-by: Tudor Florea <tudor.flore@enea.com>
From bd8a743ee0a77e65ad07ef4196c4cd366add3f26 Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Mon, 14 Sep 2015 18:24:56 +0200
Subject: [PATCH 2/2] fix infinite loop when extracting empty bzip2 data
---
extract.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/extract.c b/extract.c
index 7134bfe..29db027 100644
--- a/extract.c
+++ b/extract.c
@@ -2733,6 +2733,12 @@ __GDEF
int repeated_buf_err;
bz_stream bstrm;
+ if (G.incnt <= 0 && G.csize <= 0L) {
+ /* avoid an infinite loop */
+ Trace((stderr, "UZbunzip2() got empty input\n"));
+ return 2;
+ }
+
#if (defined(DLL) && !defined(NO_SLIDE_REDIR))
if (G.redirect_slide)
wsize = G.redirect_size, redirSlide = G.redirect_buffer;
--
2.4.6

2
meta/recipes-extended/unzip/unzip_6.0.bb
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@ -14,6 +14,8 @@ SRC_URI = "ftp://ftp.info-zip.org/pub/infozip/src/unzip60.tgz \
file://09-cve-2014-8139-crc-overflow.patch \
file://10-cve-2014-8140-test-compr-eb.patch \
file://11-cve-2014-8141-getzip64data.patch \
file://CVE-2015-7696.patch \
file://CVE-2015-7697.patch \
"
SRC_URI[md5sum] = "62b490407489521db863b523a7f86375"