From 434890df2a7c131b40fec1c49e6239972ab299d2 Mon Sep 17 00:00:00 2001 From: Peter Korsgaard Date: Thu, 30 Mar 2017 23:03:32 +0200 Subject: [PATCH] audiofile: add security patch for CVE-2017-6829 The decodeSample function in IMA.cpp in Audio File Library (aka audiofile) 0.3.6 allows remote attackers to cause a denial of service (crash) via a crafted file. https://blogs.gentoo.org/ago/2017/02/20/audiofile-global-buffer-overflow-in-decodesample-ima-cpp https://github.com/mpruett/audiofile/issues/33 Signed-off-by: Peter Korsgaard --- ...ues-to-fix-index-overflow-in-IMA.cpp.patch | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 package/audiofile/0004-clamp-index-values-to-fix-index-overflow-in-IMA.cpp.patch diff --git a/package/audiofile/0004-clamp-index-values-to-fix-index-overflow-in-IMA.cpp.patch b/package/audiofile/0004-clamp-index-values-to-fix-index-overflow-in-IMA.cpp.patch new file mode 100644 index 0000000000..21f899a46f --- /dev/null +++ b/package/audiofile/0004-clamp-index-values-to-fix-index-overflow-in-IMA.cpp.patch @@ -0,0 +1,39 @@ +From 25eb00ce913452c2e614548d7df93070bf0d066f Mon Sep 17 00:00:00 2001 +From: Antonio Larrosa +Date: Mon, 6 Mar 2017 18:02:31 +0100 +Subject: [PATCH] clamp index values to fix index overflow in IMA.cpp + +This fixes #33 +(also reported at https://bugzilla.opensuse.org/show_bug.cgi?id=1026981 +and https://blogs.gentoo.org/ago/2017/02/20/audiofile-global-buffer-overflow-in-decodesample-ima-cpp/) + +Signed-off-by: Peter Korsgaard +--- + libaudiofile/modules/IMA.cpp | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/libaudiofile/modules/IMA.cpp b/libaudiofile/modules/IMA.cpp +index 7476d44..df4aad6 100644 +--- a/libaudiofile/modules/IMA.cpp ++++ b/libaudiofile/modules/IMA.cpp +@@ -169,7 +169,7 @@ int IMA::decodeBlockWAVE(const uint8_t *encoded, int16_t *decoded) + if (encoded[1] & 0x80) + m_adpcmState[c].previousValue -= 0x10000; + +- m_adpcmState[c].index = encoded[2]; ++ m_adpcmState[c].index = clamp(encoded[2], 0, 88); + + *decoded++ = m_adpcmState[c].previousValue; + +@@ -210,7 +210,7 @@ int IMA::decodeBlockQT(const uint8_t *encoded, int16_t *decoded) + predictor -= 0x10000; + + state.previousValue = clamp(predictor, MIN_INT16, MAX_INT16); +- state.index = encoded[1] & 0x7f; ++ state.index = clamp(encoded[1] & 0x7f, 0, 88); + encoded += 2; + + for (int n=0; n