CVE-2021-33790
The RebornCore library before 4.7.3 allows remote code execution because it deserializes untrusted data in ObjectInputStream.readObject as part of reborncore.common.network.ExtendedPacketBuffer.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The RebornCore library before 4.7.3 allows remote code execution because it deserializes untrusted data in ObjectInputStream.readObject as part of reborncore.common.network.ExtendedPacketBuffer. An attacker can instantiate any class on the classpath with any data. A class usable for exploitation might or might not be present, depending on what Minecraft modifications are installed.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.84% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-502
- Affected
- techreborn/reborncore
- Source
- cve@mitre.org
References
- https://github.com/TechReborn/RebornCore/security/advisories/GHSA-r7pg-4xrf-7mrmThird Party Advisory
- https://vuln.ryotak.me/advisories/45Third Party Advisory
- https://www.curseforge.com/minecraft/mc-mods/reborncoreProduct, Third Party Advisory
- https://github.com/TechReborn/RebornCore/security/advisories/GHSA-r7pg-4xrf-7mrmThird Party Advisory
- https://vuln.ryotak.me/advisories/45Third Party Advisory
- https://www.curseforge.com/minecraft/mc-mods/reborncoreProduct, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.