Vulnerability · Published May 31, 2021 · Assigned by mitre
CVE-2021-33790
Critical 9.8
In plain English
A critical-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 87% of all known vulnerabilities).
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)2.8%top 13.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
References
- https://www.curseforge.com/minecraft/mc-mods/reborncore x_refsource_MISC
- https://vuln.ryotak.me/advisories/45 x_refsource_MISC
- https://github.com/TechReborn/RebornCore/security/advisories/GHSA-r7pg-4xrf-7mrm x_refsource_MISC