Medium severity · published Aug 22, 2023
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
CVSS
0.6%
EPSS
No
On KEV
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.
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)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
Binaryen · Webassembly
1.38.26 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-18378
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-18378
Exploit
https://github.com/WebAssembly/binaryen/issues/1900
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