https://www.cve.org/CVERecord?id=CVE-2022-37434
Signed-off-by: Peter Müller peter.mueller@ipfire.org --- lfs/zlib | 4 ++++ src/patches/zlib-CVE-2022-37434.patch | 29 +++++++++++++++++++++++++++ 2 files changed, 33 insertions(+) create mode 100644 src/patches/zlib-CVE-2022-37434.patch
diff --git a/lfs/zlib b/lfs/zlib index 19740fb7f..8197c9b45 100644 --- a/lfs/zlib +++ b/lfs/zlib @@ -77,6 +77,10 @@ $(subst %,%_BLAKE2,$(objects)) : $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects)) @$(PREBUILD) @rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar axf $(DIR_DL)/$(DL_FILE) + + # Fix for CVE-2022-37434 + cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/zlib-CVE-2022-37434.patch + cd $(DIR_APP) && CROSS_PREFIX=$(CROSS_PREFIX) ./configure --prefix=$(PREFIX) --shared cd $(DIR_APP) && make $(MAKETUNING) cd $(DIR_APP) && make install diff --git a/src/patches/zlib-CVE-2022-37434.patch b/src/patches/zlib-CVE-2022-37434.patch new file mode 100644 index 000000000..95e9f173f --- /dev/null +++ b/src/patches/zlib-CVE-2022-37434.patch @@ -0,0 +1,29 @@ +commit eff308af425b67093bab25f80f1ae950166bece1 +Author: Mark Adler fork@madler.net +Date: Sat Jul 30 15:51:11 2022 -0700 + + Fix a bug when getting a gzip header extra field with inflate(). + + If the extra field was larger than the space the user provided with + inflateGetHeader(), and if multiple calls of inflate() delivered + the extra header data, then there could be a buffer overflow of the + provided space. This commit assures that provided space is not + exceeded. + +diff --git a/inflate.c b/inflate.c +index 7be8c63..7a72897 100644 +--- a/inflate.c ++++ b/inflate.c +@@ -763,9 +763,10 @@ int flush; + copy = state->length; + if (copy > have) copy = have; + if (copy) { ++ len = state->head->extra_len - state->length; + if (state->head != Z_NULL && +- state->head->extra != Z_NULL) { +- len = state->head->extra_len - state->length; ++ state->head->extra != Z_NULL && ++ len < state->head->extra_max) { + zmemcpy(state->head->extra + len, next, + len + copy > state->head->extra_max ? + state->head->extra_max - len : copy);