CVE-2022-26477

Description

The Security Team noticed that the termination condition of the for loop in the readExternal method is a controllable variable, which, if tampered with, may lead to CPU exhaustion. As a fix, we added an upper bound and termination condition in the read and write logic. We classify it as a "low-priority but useful improvement". SystemDS is a distributed system and needs to serialize/deserialize data but in many code paths (e.g., on Spark broadcast/shuffle or writing to sequence files) the byte stream is anyway protected by additional CRC fingerprints. In this particular case though, the number of decoders is upper-bounded by twice the number of columns, which means an attacker would need to modify two entries in the byte stream in a consistent manner. By adding these checks robustness was strictly improved with almost zero overhead. These code changes are available in versions higher than 2.2.1.

Weakness classification

• security@apache.org: CWE-400
• nvd@nist.gov: CWE-400

Primary references

• security@apache.org — Mailing List, Vendor Advisory
• security@apache.org — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory