* [Buildroot] [git commit] package/rtl_433: fix CVE-2022-27419
@ 2022-04-25 20:25 Arnout Vandecappelle
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From: Arnout Vandecappelle @ 2022-04-25 20:25 UTC (permalink / raw)
To: buildroot
commit: https://git.buildroot.net/buildroot/commit/?id=ba317308439cec343d1c4844c802e17843808162
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master
rtl_433 21.12 was discovered to contain a stack overflow in the function
acurite_00275rm_decode at /devices/acurite.c. This vulnerability allows
attackers to cause a Denial of Service (DoS) via a crafted file.
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
---
.../0004-Fix-overflow-in-Acurite-00275rm.patch | 35 ++++++++++++++++++++++
package/rtl_433/rtl_433.mk | 3 ++
2 files changed, 38 insertions(+)
diff --git a/package/rtl_433/0004-Fix-overflow-in-Acurite-00275rm.patch b/package/rtl_433/0004-Fix-overflow-in-Acurite-00275rm.patch
new file mode 100644
index 0000000000..057bf9cf64
--- /dev/null
+++ b/package/rtl_433/0004-Fix-overflow-in-Acurite-00275rm.patch
@@ -0,0 +1,35 @@
+From 37455483889bd1c641bdaafc493d1cc236b74904 Mon Sep 17 00:00:00 2001
+From: "Christian W. Zuckschwerdt" <christian@zuckschwerdt.org>
+Date: Fri, 18 Mar 2022 08:09:15 +0100
+Subject: [PATCH] Fix overflow in Acurite-00275rm (closes #2012)
+
+[Retrieved from:
+https://github.com/merbanan/rtl_433/commit/37455483889bd1c641bdaafc493d1cc236b74904]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ src/devices/acurite.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/devices/acurite.c b/src/devices/acurite.c
+index 6879e52da..4f3e83eb3 100644
+--- a/src/devices/acurite.c
++++ b/src/devices/acurite.c
+@@ -1318,15 +1318,15 @@ static int acurite_00275rm_decode(r_device *decoder, bitbuffer_t *bitbuffer)
+
+ // Combine signal if exactly three repeats were found
+ if (n_rows == 3) {
+- uint8_t *b = bitbuffer->bb[bitbuffer->num_rows];
++ bitbuffer_add_row(bitbuffer);
++ uint8_t *b = bitbuffer->bb[bitbuffer->num_rows - 1];
+ for (int i = 0; i < 11; ++i) {
+ // The majority bit count wins
+ b[i] = (b_rows[0][i] & b_rows[1][i]) |
+ (b_rows[1][i] & b_rows[2][i]) |
+ (b_rows[2][i] & b_rows[0][i]);
+ }
+- bitbuffer->bits_per_row[bitbuffer->num_rows] = 88;
+- bitbuffer->num_rows += 1;
++ bitbuffer->bits_per_row[bitbuffer->num_rows - 1] = 88;
+ }
+
+ // Output the first valid row
diff --git a/package/rtl_433/rtl_433.mk b/package/rtl_433/rtl_433.mk
index d1c28adbf5..8326caedb2 100644
--- a/package/rtl_433/rtl_433.mk
+++ b/package/rtl_433/rtl_433.mk
@@ -20,6 +20,9 @@ RTL_433_CONF_OPTS = \
# 0003-minor-Fix-overflow-in-Clipsal-CMR113-and-Somfy-IOHC.patch
RTL_433_IGNORE_CVES += CVE-2022-25051
+# 0004-Fix-overflow-in-Acurite-00275rm.patch
+RTL_433_IGNORE_CVES += CVE-2022-27419
+
ifeq ($(BR2_PACKAGE_LIBRTLSDR),y)
RTL_433_DEPENDENCIES += librtlsdr
RTL_433_CONF_OPTS += -DENABLE_RTLSDR=ON
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2022-04-25 20:25 [Buildroot] [git commit] package/rtl_433: fix CVE-2022-27419 Arnout Vandecappelle
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