CVE-2020-28975 : svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Published 2020-11-21 21:15:11

Updated 2024-08-04 17:15:45

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory CorruptionDenial of service

Products affected by CVE-2020-28975

Scikit-learn » Scikit-learn
Versions from including (>=) 0.23.2 and before (<) 1.0.1
cpe:2.3:a:scikit-learn:scikit-learn:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2020-28975

EPSS FAQ

0.17%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 35 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-28975

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

References for CVE-2020-28975

https://github.com/cjlin1/libsvm/blob/9a3a9708926dec87d382c43b203f2ca19c2d56a0/svm.cpp#L2501

libsvm/svm.cpp at 9a3a9708926dec87d382c43b203f2ca19c2d56a0 · cjlin1/libsvm · GitHub
Exploit;Third Party Advisory
https://github.com/scikit-learn/scikit-learn/issues/18891

Segmentation fault on SVMLIB · Issue #18891 · scikit-learn/scikit-learn · GitHub
Exploit;Issue Tracking;Third Party Advisory
https://github.com/scikit-learn/scikit-learn/commit/1bf13d567d3cd74854aa8343fd25b61dd768bb85

FIX Prevents segfault in SVC when internals are altered (#21336) · scikit-learn/scikit-learn@1bf13d5 · GitHub
Patch;Third Party Advisory
https://security.gentoo.org/glsa/202301-03

scikit-learn: Denial of Service (GLSA 202301-03) — Gentoo security
Third Party Advisory
http://packetstormsecurity.com/files/160281/SciKit-Learn-0.23.2-Denial-Of-Service.html

SciKit-Learn 0.23.2 Denial Of Service ≈ Packet Storm
Exploit;Third Party Advisory;VDB Entry
http://seclists.org/fulldisclosure/2020/Nov/44

Full Disclosure: scikit-learn 0.23.2 Local Denial of Service
Mailing List;Third Party Advisory

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Vulnerability Details : CVE-2020-28975

Products affected by CVE-2020-28975

Exploit prediction scoring system (EPSS) score for CVE-2020-28975

CVSS scores for CVE-2020-28975

References for CVE-2020-28975