60 lines
1.8 KiB
Diff
60 lines
1.8 KiB
Diff
From a9dc7c2f59dc5e92870d2d46316ea5c1f14740e3 Mon Sep 17 00:00:00 2001
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From: Denys Vlasenko <vda.linux@googlemail.com>
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Date: Mon, 30 Jun 2014 10:14:34 +0200
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Subject: [PATCH] lzop: add overflow check
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See CVE-2014-4607
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http://www.openwall.com/lists/oss-security/2014/06/26/20
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function old new delta
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lzo1x_decompress_safe 1010 1031 +21
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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---
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archival/libarchive/liblzo.h | 2 ++
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archival/libarchive/lzo1x_d.c | 3 +++
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2 files changed, 5 insertions(+)
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--- a/archival/libarchive/liblzo.h
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+++ b/archival/libarchive/liblzo.h
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@@ -76,11 +76,13 @@
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# define TEST_IP (ip < ip_end)
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# define NEED_IP(x) \
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if ((unsigned)(ip_end - ip) < (unsigned)(x)) goto input_overrun
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+# define TEST_IV(x) if ((x) > (unsigned)0 - (511)) goto input_overrun
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# undef TEST_OP /* don't need both of the tests here */
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# define TEST_OP 1
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# define NEED_OP(x) \
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if ((unsigned)(op_end - op) < (unsigned)(x)) goto output_overrun
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+# define TEST_OV(x) if ((x) > (unsigned)0 - (511)) goto output_overrun
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#define HAVE_ANY_OP 1
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--- a/archival/libarchive/lzo1x_d.c
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+++ b/archival/libarchive/lzo1x_d.c
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@@ -92,6 +92,7 @@ int lzo1x_decompress_safe(const uint8_t*
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ip++;
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NEED_IP(1);
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}
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+ TEST_IV(t);
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t += 15 + *ip++;
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}
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/* copy literals */
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@@ -224,6 +225,7 @@ int lzo1x_decompress_safe(const uint8_t*
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ip++;
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NEED_IP(1);
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}
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+ TEST_IV(t);
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t += 31 + *ip++;
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}
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#if defined(COPY_DICT)
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@@ -265,6 +267,7 @@ int lzo1x_decompress_safe(const uint8_t*
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ip++;
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NEED_IP(1);
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}
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+ TEST_IV(t);
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t += 7 + *ip++;
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}
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#if defined(COPY_DICT)
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