Xerial snappy-java before 1.1.10.9 contains an unbounded memory allocation vulnerability that allows attackers to exhaust JVM memory by declaring a large uncompressed length in compressed input. Attackers can supply a few crafted bytes to Snappy.uncompress, uncompressString, SnappyInputStream or SnappyFramedInputStream to force allocations up to 2 GB, causing OutOfMemoryError and denial of service.
Weakness
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
Potential Mitigations
References
- https://github.com/xerial/snappy-java
- https://github.com/xerial/snappy-java/blob/v1.1.10.8/src/main/java/org/xerial/snappy/Snappy.java#L517
- https://github.com/xerial/snappy-java/commit/943c6043a292568575e8347af4507d015e802c75
- https://github.com/xerial/snappy-java/releases/tag/v1.1.10.9
- https://github.com/xerial/snappy-java/security/advisories/GHSA-q233-g92q-qxp6
- https://www.vulncheck.com/advisories/xerial-snappy-java-before-1.1.10.9-unbounded-memory-allocation-denial-of-service