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([203.211.105.219]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a8543ab76bsm7541636a91.13.2026.10.06.19.16.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Oct 2026 19:16:45 -0700 (PDT) From: ankur.tyagi85@gmail.com To: openembedded-devel@lists.openembedded.org Cc: Ankur Tyagi Subject: [oe][meta-oe][wrynose][PATCH v2 1/2] rabbitmq-c: patch CVE-2026-44235 Date: Wed, 7 Oct 2026 15:16:29 +1300 Message-ID: <20261007021630.3024955-1-ankur.tyagi85@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Wed, 07 Oct 2026 02:16:52 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-devel/message/130640 From: Ankur Tyagi Details: https://nvd.nist.gov/vuln/detail/cve-2026-44235 Signed-off-by: Ankur Tyagi --- .../rabbitmq-c/CVE-2026-44235.patch | 85 +++++++++++++++++++ .../rabbitmq-c/rabbitmq-c_0.15.0.bb | 1 + 2 files changed, 86 insertions(+) create mode 100644 meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-44235.patch diff --git a/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-44235.patch b/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-44235.patch new file mode 100644 index 0000000000..c663d24eec --- /dev/null +++ b/meta-oe/recipes-connectivity/rabbitmq-c/rabbitmq-c/CVE-2026-44235.patch @@ -0,0 +1,85 @@ +From 52f00ef57e55c783c2c436590296d9ff986b65d0 Mon Sep 17 00:00:00 2001 +From: Claude +Date: Tue, 28 Apr 2026 00:30:47 +0000 +Subject: [PATCH] amqp_connection: reject undersized frames in + amqp_handle_input + +A malicious AMQP server (or active network attacker on an unencrypted +connection) can send an AMQP frame whose stated frame body is shorter +than the per-frame-type header it claims to carry. amqp_handle_input() +then computed encoded.len as + + state->target_size - HEADER_SIZE - - FOOTER_SIZE + +with no lower-bound check on target_size. Because encoded.len is a +size_t, the subtraction wrapped to a value near SIZE_MAX. The bogus +length was passed to amqp_decode_method() / amqp_decode_properties() +and through to the table decoder, whose internal bounds checks could +no longer constrain the parser. The result was an out-of-bounds read +and process crash on the client side, reachable during amqp_login. + +Validate target_size against the minimum required for each frame type +(METHOD: HEADER_SIZE+4+FOOTER_SIZE, HEADER: HEADER_SIZE+12+FOOTER_SIZE, +BODY: HEADER_SIZE+FOOTER_SIZE) and return AMQP_STATUS_BAD_AMQP_DATA +when the frame is too small, before computing encoded.len. + +Add the verified PoC bytes as a regression seed for the existing +fuzz_server harness. + +Refs: GHSA-9mmv-r8g3-qp46 +(cherry picked from commit 1d3afbb056fee5cc9ea05680bf32288715d0d802) + +CVE: CVE-2026-44235 +Upstream-Status: Backport [https://github.com/alanxz/rabbitmq-c/commit/1d3afbb056fee5cc9ea05680bf32288715d0d802] + +Dropped fuzz input for the regression test during backport. + +Signed-off-by: Ankur Tyagi +--- + librabbitmq/amqp_connection.c | 19 ++++++++++++++++++ + 1 file changed, 19 insertions(+) + +diff --git a/librabbitmq/amqp_connection.c b/librabbitmq/amqp_connection.c +index 56ab8a8..4326ef7 100644 +--- a/librabbitmq/amqp_connection.c ++++ b/librabbitmq/amqp_connection.c +@@ -320,6 +320,13 @@ int amqp_handle_input(amqp_connection_state_t state, amqp_bytes_t received_data, + + switch (decoded_frame->frame_type) { + case AMQP_FRAME_METHOD: ++ /* A METHOD frame body must contain at least the 4-byte method id. ++ * Reject undersized frames before subtracting from target_size to ++ * avoid an unsigned underflow that would yield a huge encoded.len ++ * and cause out-of-bounds reads in amqp_decode_method(). */ ++ if (state->target_size < HEADER_SIZE + 4 + FOOTER_SIZE) { ++ return AMQP_STATUS_BAD_AMQP_DATA; ++ } + decoded_frame->payload.method.id = + amqp_d32(amqp_offset(raw_frame, HEADER_SIZE)); + encoded.bytes = amqp_offset(raw_frame, HEADER_SIZE + 4); +@@ -335,6 +342,15 @@ int amqp_handle_input(amqp_connection_state_t state, amqp_bytes_t received_data, + break; + + case AMQP_FRAME_HEADER: ++ /* A HEADER frame body must contain at least 12 bytes (class_id, ++ * weight, body_size). Reject undersized frames before subtracting ++ * from target_size to avoid an unsigned underflow that would yield ++ * a huge encoded.len and cause out-of-bounds reads in ++ * amqp_decode_properties() / the table decoder ++ * (CVE: GHSA-9mmv-r8g3-qp46). */ ++ if (state->target_size < HEADER_SIZE + 12 + FOOTER_SIZE) { ++ return AMQP_STATUS_BAD_AMQP_DATA; ++ } + decoded_frame->payload.properties.class_id = + amqp_d16(amqp_offset(raw_frame, HEADER_SIZE)); + /* unused 2-byte weight field goes here */ +@@ -354,6 +370,9 @@ int amqp_handle_input(amqp_connection_state_t state, amqp_bytes_t received_data, + break; + + case AMQP_FRAME_BODY: ++ if (state->target_size < HEADER_SIZE + FOOTER_SIZE) { ++ return AMQP_STATUS_BAD_AMQP_DATA; ++ } + decoded_frame->payload.body_fragment.len = + state->target_size - HEADER_SIZE - FOOTER_SIZE; + decoded_frame->payload.body_fragment.bytes = 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..642e1e443b 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-2026-44235.patch \ " SRCREV = "84b81cd97a1b5515d3d4b304796680da24c666d8"