Buffer overflow in Messagepack
CVE-2020-5234
MessagePack for C# and Unity before version 1.9.11 and 2.1.90 has a vulnerability where untrusted data can lead to DoS attack due to hash collisions and stack overflow. Review the linked GitHub Security Advisory for more information and remediation steps.
Vulnerability class: Buffer Overflow
EPSS: 0.016 (73.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Messagepack — versions 2.0.94, 2.0.110, 2.0.119
- Neuecc Messagepack — versions < 1.9.11, >= 2.0.0, < 2.1.90
- Neuecc Messagepack.immutablecollection — versions < 1.9.11, >= 2.0.0, < 2.1.90
- Neuecc Messagepack.reactiveproperty — versions < 1.9.11, >= 2.0.0, < 2.1.90
- Neuecc Messagepack.unityshims — versions < 1.9.11, >= 2.0.0, < 2.1.90
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-5234?
- CVE-2020-5234 is a medium-severity vulnerability in Messagepack, classified under Stack-based Buffer Overflow. CVSS score: 4.8/10. Published 2020-01-31.
- How severe is CVE-2020-5234?
- Medium severity. CVSS v3 base score is 4.8 out of 10.