yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4FrameInputStream readHeader() allocates two new 4 MiB block buffers whenever a maximum-block-size frame header is read, and the default concatenated-frame mode allows attacker-controlled streams containing many minimal empty frames to trigger roughly 8 MiB of allocation for every 11 input bytes. The stream produces no decompressed output while consuming CPU and garbage-collection time, so decompressed-size limits do not mitigate the issue; readSingleFrame mode is not affected.
This issue is fixed in version 1.11.4.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
yawkat:lz4-java
References 3
https://github.com/yawkat/lz4-java/commit/2acc0ec1ead226145c62a817c18c8ed49233a…
security-advisories@github.com
https://github.com/yawkat/lz4-java/releases/tag/v1.11.4
security-advisories@github.com
https://github.com/yawkat/lz4-java/security/advisories/GHSA-gm45-99xc-r7wv
security-advisories@github.com