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Fri, 09 Oct 2026 10:01:34 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-devel/message/130681 A heap buffer overflow exists in rabbitmq-c when the public amqp_send_frame() API is used to serialize an oversized AMQP_FRAME_BODY. The issue occurs because amqp_frame_to_bytes() copies frame.payload.body_fragment.len bytes into the connection outbound buffer without validating that the body fragment fits within the allocated frame buffer. An application that passes an oversized body frame to amqp_send_frame() can trigger a heap out-of-bounds write, resulting in process crash and memory corruption. Reference: [https://security-tracker.debian.org/tracker/CVE-2026-61547] [https://github.com/alanxz/rabbitmq-c/security/advisories/GHSA-hfjv-vcp3-39wh] Backport the patch to fix CVE-2026-61547 [https://github.com/alanxz/rabbitmq-c/commit/02d278663f3a93db9fe4fb4e7e34dc96b83c107b] Signed-off-by: Poornima Lokesh --- .../rabbitmq-c/CVE-2026-61547.patch | 128 ++++++++++++++++++ .../rabbitmq-c/rabbitmq-c_0.15.0.bb | 1 + 2 files changed, 129 insertions(+) create mode 100644 meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-61547.patch diff --git a/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-61547.patch b/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-61547.patch new file mode 100644 index 0000000000..d1e479c308 --- /dev/null +++ b/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-61547.patch @@ -0,0 +1,128 @@ +From 413658f73078b91dee9efb442add63cbf3cc8dea Mon Sep 17 00:00:00 2001 +From: Poornima Lokesh +Date: Thu, 8 Oct 2026 09:29:12 +0000 +Subject: [PATCH] rabbitmq-c: patch CVE-2026-61547 + +Fix heap buffer overflow in amqp_frame_to_bytes for oversized body frames. + +amqp_send_frame() -> amqp_frame_to_bytes() copied +frame.payload.body_fragment.len bytes into the outbound buffer without +validating that the body fragment fit within the allocated frame buffer. +An application passing an oversized AMQP_FRAME_BODY to the public +amqp_send_frame() API could trigger a heap out-of-bounds write. + +Bound the body fragment to the usable payload size +(buffer.len - HEADER_SIZE - FOOTER_SIZE), returning +AMQP_STATUS_BAD_AMQP_DATA when it does not fit. Add a regression test. + +Details: +https://nvd.nist.gov/vuln/detail/CVE-2026-61547 + +CVE: CVE-2026-61547 + +Upstream-Status: Backport [https://github.com/alanxz/rabbitmq-c/commit/02d278663f3a93db9fe4fb4e7e34dc96b83c107b] + +Signed-off-by: Poornima Lokesh +--- + librabbitmq/amqp_connection.c | 8 +++++ + tests/CMakeLists.txt | 3 ++ + tests/test_send_frame.c | 57 +++++++++++++++++++++++++++++++++++ + 3 files changed, 68 insertions(+) + create mode 100644 tests/test_send_frame.c + +diff --git a/librabbitmq/amqp_connection.c b/librabbitmq/amqp_connection.c +index 56ab8a8..8c1e9c0 100644 +--- a/librabbitmq/amqp_connection.c ++++ b/librabbitmq/amqp_connection.c +@@ -441,6 +441,14 @@ static int amqp_frame_to_bytes(const amqp_frame_t *frame, amqp_bytes_t buffer, + case AMQP_FRAME_BODY: { + const amqp_bytes_t *body = &frame->payload.body_fragment; + ++ /* Ensure the body fragment fits within the outbound buffer, leaving ++ * room for the frame header and footer. Without this check an ++ * oversized body fragment would overflow the heap-allocated buffer. */ ++ if (buffer.len < HEADER_SIZE + FOOTER_SIZE || ++ body->len > buffer.len - (HEADER_SIZE + FOOTER_SIZE)) { ++ return AMQP_STATUS_BAD_AMQP_DATA; ++ } ++ + memcpy(amqp_offset(out_frame, HEADER_SIZE), body->bytes, body->len); + + out_frame_len = body->len; +diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt +index 8c0aee0..194af0c 100644 +--- a/tests/CMakeLists.txt ++++ b/tests/CMakeLists.txt +@@ -41,3 +41,6 @@ add_executable(test_merge_capabilities test_merge_capabilities.c) + target_link_libraries(test_merge_capabilities rabbitmq-static) + add_test(merge_capabilities test_merge_capabilities) + ++add_executable(test_send_frame test_send_frame.c) ++target_link_libraries(test_send_frame rabbitmq-static) ++add_test(send_frame test_send_frame) +diff --git a/tests/test_send_frame.c b/tests/test_send_frame.c +new file mode 100644 +index 0000000..4d8e067 +--- /dev/null ++++ b/tests/test_send_frame.c +@@ -0,0 +1,57 @@ ++// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors. ++// SPDX-License-Identifier: mit ++ ++#include "amqp_private.h" ++#include ++#include ++ ++#include ++#include ++#include ++ ++/* Regression test for GHSA-hfjv-vcp3-39wh: passing an oversized ++ * AMQP_FRAME_BODY to amqp_send_frame() must not overflow the outbound ++ * buffer. It should be rejected with AMQP_STATUS_BAD_AMQP_DATA. */ ++static void test_oversized_body_frame_rejected(void) { ++ amqp_connection_state_t state = amqp_new_connection(); ++ amqp_frame_t frame; ++ size_t body_len; ++ char *body; ++ int res; ++ ++ if (state == NULL) { ++ fprintf(stderr, "amqp_new_connection failed\n"); ++ abort(); ++ } ++ ++ /* The default outbound buffer is AMQP_DEFAULT_FRAME_SIZE bytes; use a ++ * body fragment that is larger than that buffer can hold. */ ++ body_len = state->outbound_buffer.len + 1024; ++ body = malloc(body_len); ++ if (body == NULL) { ++ fprintf(stderr, "malloc failed\n"); ++ abort(); ++ } ++ memset(body, 'A', body_len); ++ ++ memset(&frame, 0, sizeof(frame)); ++ frame.frame_type = AMQP_FRAME_BODY; ++ frame.channel = 1; ++ frame.payload.body_fragment.bytes = body; ++ frame.payload.body_fragment.len = body_len; ++ ++ res = amqp_send_frame(state, &frame); ++ if (res != AMQP_STATUS_BAD_AMQP_DATA) { ++ fprintf(stderr, "expected AMQP_STATUS_BAD_AMQP_DATA (%d), got %d\n", ++ AMQP_STATUS_BAD_AMQP_DATA, res); ++ abort(); ++ } ++ ++ free(body); ++ amqp_destroy_connection(state); ++} ++ ++int main(void) { ++ test_oversized_body_frame_rejected(); ++ return 0; ++} +-- +2.35.5 + diff --git a/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c_0.15.0.bb b/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c_0.15.0.bb index 4fd6302f2c..b8bc5b57e3 100644 --- a/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c_0.15.0.bb +++ b/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c_0.15.0.bb @@ -4,6 +4,7 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=7e12f6e40e662e039e2f02b4893011ec" LICENSE = "MIT" SRC_URI = "git://github.com/alanxz/rabbitmq-c.git;branch=master;protocol=https \ + file://CVE-2026-61547.patch \ " SRCREV = "84b81cd97a1b5515d3d4b304796680da24c666d8"