[Buildroot] [git commit branch/next] package/lz4: add upstream security fix for CVE-2021-3520
From: Yann E. MORIN <hidden>
Date: 2021-08-03 22:41:35
Subsystem:
the rest · Maintainer:
Linus Torvalds
commit: https://git.buildroot.net/buildroot/commit/?id=ecb55c43cea48445fec74b0c9758431bcb1a54f0 branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/next Fixes a potential memory corruption with negative memmove() size. For details, see (NVD not yet updated): https://security-tracker.debian.org/tracker/CVE-2021-3520 Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Yann E. MORIN <redacted> --- ...al-memory-corruption-with-negative-memmov.patch | 26 ++++++++++++++++++++++ package/lz4/lz4.mk | 3 +++ 2 files changed, 29 insertions(+)
diff --git a/package/lz4/0001-Fix-potential-memory-corruption-with-negative-memmov.patch b/package/lz4/0001-Fix-potential-memory-corruption-with-negative-memmov.patch
new file mode 100644
index 0000000000..57e4e38f84
--- /dev/null
+++ b/package/lz4/0001-Fix-potential-memory-corruption-with-negative-memmov.patch@@ -0,0 +1,26 @@ +From 8301a21773ef61656225e264f4f06ae14462bca7 Mon Sep 17 00:00:00 2001 +From: Jasper Lievisse Adriaanse <j@jasper.la> +Date: Fri, 26 Feb 2021 15:21:20 +0100 +Subject: [PATCH] Fix potential memory corruption with negative memmove() size + +Signed-off-by: Peter Korsgaard <peter@korsgaard.com> +--- + lib/lz4.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/lib/lz4.c b/lib/lz4.c +index 5f524d0..c2f504e 100644 +--- a/lib/lz4.c ++++ b/lib/lz4.c +@@ -1749,7 +1749,7 @@ LZ4_decompress_generic( + const size_t dictSize /* note : = 0 if noDict */ + ) + { +- if (src == NULL) { return -1; } ++ if ((src == NULL) || (outputSize < 0)) { return -1; } + + { const BYTE* ip = (const BYTE*) src; + const BYTE* const iend = ip + srcSize; +-- +2.20.1 +
diff --git a/package/lz4/lz4.mk b/package/lz4/lz4.mk
index e0236c05b1..9b9b6198c3 100644
--- a/package/lz4/lz4.mk
+++ b/package/lz4/lz4.mk@@ -17,6 +17,9 @@ LZ4_CPE_ID_VENDOR = yann_collet # See https://github.com/lz4/lz4/issues/818 LZ4_IGNORE_CVES += CVE-2014-4715 +# 0001-Fix-potential-memory-corruption-with-negative-memmov.patch +LZ4_IGNORE_CVES += CVE-2021-3520 + ifeq ($(BR2_STATIC_LIBS),y) LZ4_MAKE_OPTS += BUILD_SHARED=no else ifeq ($(BR2_SHARED_LIBS),y)
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