Medium severity · published Feb 10, 2019
CVE-2019-7703
In Binaryen 1.38.22, there is a use-after-free problem in wasm::WasmBinaryBuilder::visitCall in wasm-binary.cpp
6.5
CVSS
1.5%
EPSS
No
On KEV
Description
In Binaryen 1.38.22, there is a use-after-free problem in wasm::WasmBinaryBuilder::visitCall in wasm-binary.cpp. Remote attackers could leverage this vulnerability to cause a denial-of-service via a wasm file, as demonstrated by wasm-merge.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
Binaryen · Webassembly
before 64 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-7703
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-7703
Exploit
https://github.com/WebAssembly/binaryen/issues/1865
More from Binaryen
7.5
CVE-2021-45290
A Denial of Service vulnerability exits in Binaryen 103 due to an assertion abort in wasm::handle_unreachable
7.1
CVE-2025-14956
WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow
6.5
CVE-2020-18382
Heap-buffer-overflow in /src/wasm/wasm-binary.cpp in wasm::WasmBinaryBuilder::visitBlock(wasm::Block*) in Binaryen 1.38.26
6.5
CVE-2020-18378
A NULL pointer dereference was discovered in SExpressionWasmBuilder::makeBlock in wasm/wasm-s-parser.c in Binaryen 1.38.26
6.5
CVE-2019-15759
An issue was discovered in Binaryen 1.38.32