Resource exhaustion in Apache Systemds
CVE-2022-26477
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.022 (81.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.022 · change: +0.001
Affected products
- Apache Systemds
- Apache Software Foundation Systemds — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread/r4x2d2r6d4zykdrrx6s2l4qbxgzws0z3 (Mailing List, Vendor Advisory)
- security.netapp.com/advisory/ntap-20220812-0003/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-26477?
- CVE-2022-26477 is a high-severity vulnerability in Apache Systemds, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-06-27.
- How severe is CVE-2022-26477?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-26477 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.