References
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29458
The out-of-bounds read is triggered when Exiv2 is used to write metadata
into a crafted image file.
An attacker could potentially exploit the vulnerability to cause a denial
of service by crashing Exiv2,
if they can trick the victim into running Exiv2 on a crafted image file.
Upstream-Status: Accepted
[https://github.com/Exiv2/exiv2/pull/1536/commits/06d2db6e5fd2fcca9c060e95fc97f8a5b5d4c22d]
CVE: CVE-2021-29458
Signed-off-by: Wang Mingyu <wan...@fujitsu.com>
---
.../exiv2/exiv2/CVE-2021-29458.patch | 37 +++++++++++++++++++
meta-oe/recipes-support/exiv2/exiv2_0.27.3.bb | 3 +-
2 files changed, 39 insertions(+), 1 deletion(-)
create mode 100644 meta-oe/recipes-support/exiv2/exiv2/CVE-2021-29458.patch
diff --git a/meta-oe/recipes-support/exiv2/exiv2/CVE-2021-29458.patch
b/meta-oe/recipes-support/exiv2/exiv2/CVE-2021-29458.patch
new file mode 100644
index 000000000..285f6fe4c
--- /dev/null
+++ b/meta-oe/recipes-support/exiv2/exiv2/CVE-2021-29458.patch
@@ -0,0 +1,37 @@
+From 9b7a19f957af53304655ed1efe32253a1b11a8d0 Mon Sep 17 00:00:00 2001
+From: Kevin Backhouse <kevinbackho...@github.com>
+Date: Fri, 9 Apr 2021 13:37:48 +0100
+Subject: [PATCH] Fix integer overflow.
+---
+ src/crwimage_int.cpp | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/src/crwimage_int.cpp b/src/crwimage_int.cpp
+index aefaf22..2e3e507 100644
+--- a/src/crwimage_int.cpp
++++ b/src/crwimage_int.cpp
+@@ -559,7 +559,7 @@ namespace Exiv2 {
+ void CiffComponent::setValue(DataBuf buf)
+ {
+ if (isAllocated_) {
+- delete pData_;
++ delete[] pData_;
+ pData_ = 0;
+ size_ = 0;
+ }
+@@ -1167,7 +1167,11 @@ namespace Exiv2 {
+ pCrwMapping->crwDir_);
+ if (edX != edEnd || edY != edEnd || edO != edEnd) {
+ uint32_t size = 28;
+- if (cc && cc->size() > size) size = cc->size();
++ if (cc) {
++ if (cc->size() < size)
++ throw Error(kerCorruptedMetadata);
++ size = cc->size();
++ }
+ DataBuf buf(size);
+ std::memset(buf.pData_, 0x0, buf.size_);
+ if (cc) std::memcpy(buf.pData_ + 8, cc->pData() + 8, cc->size() -
8);
+--
+2.25.1
+
diff --git a/meta-oe/recipes-support/exiv2/exiv2_0.27.3.bb
b/meta-oe/recipes-support/exiv2/exiv2_0.27.3.bb
index a13db42ed..1dc909eeb 100644
--- a/meta-oe/recipes-support/exiv2/exiv2_0.27.3.bb
+++ b/meta-oe/recipes-support/exiv2/exiv2_0.27.3.bb
@@ -10,7 +10,8 @@ SRC_URI[sha256sum] =
"a79f5613812aa21755d578a297874fb59a85101e793edc64ec2c6bd994
# Once patch is obsolete (project should be aware due to PRs), dos2unix can be
removed either
inherit dos2unix
SRC_URI +=
"file://0001-Use-compiler-fcf-protection-only-if-compiler-arch-su.patch \
- file://CVE-2021-29457.patch"
+ file://CVE-2021-29457.patch \
+ file://CVE-2021-29458.patch"
S = "${WORKDIR}/${BPN}-${PV}-Source"
--
2.25.1
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