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.

How to fix CVE-2022-26477

To remediate CVE-2022-26477, upgrade the affected package to a fixed version below.

• —upgrade to 2.2.2 or later
• —upgrade to 2.2.2 or later
• —upgrade to 2.2.2 or later

Is CVE-2022-26477 being exploited?

Moderate — EPSS is 6.1%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (3)

• from 0, < 2.2.2
• from 0, < 2.2.2
• from 0, < 2.2.2

CVSS scores

References (6)

• ADVISORYgithub.com/advisories/GHSA-m43h-hfrq-x8wx
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-26477
• PATCHgithub.com/apache/systemds
• WEBgithub.com/pypa/advisory-database/tree/main/vulns/systemds/PYSEC-2022-222.yaml
• WEB