![Peter Korsgaard](/assets/img/avatar_default.png)
Fixes the following security vulnerabilities: CVE-2017-14634: In libsndfile 1.0.28, a divide-by-zero error exists in the function double64_init() in double64.c, which may lead to DoS when playing a crafted audio file CVE-2017-17456: The function d2alaw_array() in alaw.c of libsndfile 1.0.29pre1 may lead to a remote DoS attack (SEGV on unknown address 0x000000000000), a different vulnerability than CVE-2017-14245 CVE-2017-17457: The function d2ulaw_array() in ulaw.c of libsndfile 1.0.29pre1 may lead to a remote DoS attack (SEGV on unknown address 0x000000000000), a different vulnerability than CVE-2017-14246 CVE-2018-13139: A stack-based buffer overflow in psf_memset in common.c in libsndfile 1.0.28 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted audio file. The vulnerability can be triggered by the executable sndfile-deinterleave CVE-2018-19661: An issue was discovered in libsndfile 1.0.28. There is a buffer over-read in the function i2ulaw_array in ulaw.c that will lead to a denial of service CVE-2018-19662: An issue was discovered in libsndfile 1.0.28. There is a buffer over-read in the function i2alaw_array in alaw.c that will lead to a denial of service Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
From 85c877d5072866aadbe8ed0c3e0590fbb5e16788 Mon Sep 17 00:00:00 2001
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From: Fabian Greffrath <fabian@greffrath.com>
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Date: Thu, 28 Sep 2017 12:15:04 +0200
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Subject: [PATCH] double64_init: Check psf->sf.channels against upper bound
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This prevents division by zero later in the code.
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While the trivial case to catch this (i.e. sf.channels < 1) has already
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been covered, a crafted file may report a number of channels that is
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so high (i.e. > INT_MAX/sizeof(double)) that it "somehow" gets
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miscalculated to zero (if this makes sense) in the determination of the
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blockwidth. Since we only support a limited number of channels anyway,
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make sure to check here as well.
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CVE-2017-14634
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Closes: https://github.com/erikd/libsndfile/issues/318
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Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
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Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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---
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src/double64.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/double64.c b/src/double64.c
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index b318ea86..78dfef7f 100644
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--- a/src/double64.c
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+++ b/src/double64.c
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@@ -91,7 +91,7 @@ int
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double64_init (SF_PRIVATE *psf)
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{ static int double64_caps ;
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- if (psf->sf.channels < 1)
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+ if (psf->sf.channels < 1 || psf->sf.channels > SF_MAX_CHANNELS)
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{ psf_log_printf (psf, "double64_init : internal error : channels = %d\n", psf->sf.channels) ;
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return SFE_INTERNAL ;
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} ;
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--
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2.11.0
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