Vulnerability · Published Aug 22, 2023 · Assigned by mitre
CVE-2020-18378
Medium 6.5
In plain English
A medium-severity null pointer dereference in the binaryen package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.6%top 50.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A NULL pointer dereference was discovered in SExpressionWasmBuilder::makeBlock in wasm/wasm-s-parser.c in Binaryen 1.38.26. A crafted wasm input can cause a segmentation fault, leading to denial-of-service, as demonstrated by wasm-as.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | binaryen | 68-1 | DEBIAN-CVE-2020-18378 |
| Debian:13 | binaryen | 68-1 | DEBIAN-CVE-2020-18378 |
| Debian:14 | binaryen | 68-1 | DEBIAN-CVE-2020-18378 |
| Ubuntu:22.04:LTS | binaryen | no fix listed | UBUNTU-CVE-2020-18378 |
| Ubuntu:24.04:LTS | binaryen | no fix listed | UBUNTU-CVE-2020-18378 |
| Ubuntu:25.10 | binaryen | no fix listed | UBUNTU-CVE-2020-18378 |
| Ubuntu:26.04:LTS | binaryen | no fix listed | UBUNTU-CVE-2020-18378 |
| Ubuntu:26.10 | binaryen | no fix listed | UBUNTU-CVE-2020-18378 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H