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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.016 (74.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
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
- github.com/neuecc/MessagePack-CSharp/security/advisories/GHSA-7q36-4xx7-xcxf (Third Party Advisory)
- github.com/neuecc/MessagePack-CSharp/commit/56fa86219d01d0a183babbbbcb34abbdea5… (Patch, Third Party Advisory)
- github.com/neuecc/MessagePack-CSharp/issues/810
- github.com/neuecc/MessagePack-CSharp/commit/f88684078698386df02204f13faeff098a6…
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.