Vulnerability-Lookup

CNVD-2019-16220

Vulnerability from cnvd - Published: 2019-06-02

Title

PaX read_kmem拒绝服务漏洞

Description

pax是Linux的一个补丁，是通过防止内存破坏漏洞的利用来提高系统的安全性。 PaX中的grsecurity PaX补丁存在安全漏洞。攻击者可利用该漏洞造成系统崩溃（内存泄露）。

Severity

中

Formal description

目前厂商暂未发布修复措施解决此安全问题，建议使用此软件的用户随时关注厂商主页或参考网址以获取解决办法： https://www.grsecurity.net/

Reference

https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0784

Impacted products

Name
PAX PaX

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JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-5023",
      "cveUrl": "http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5023"
    }
  },
  "description": "pax\u662fLinux\u7684\u4e00\u4e2a\u8865\u4e01\uff0c\u662f\u901a\u8fc7\u9632\u6b62\u5185\u5b58\u7834\u574f\u6f0f\u6d1e\u7684\u5229\u7528\u6765\u63d0\u9ad8\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3002\n\nPaX\u4e2d\u7684grsecurity PaX\u8865\u4e01\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u7cfb\u7edf\u5d29\u6e83\uff08\u5185\u5b58\u6cc4\u9732\uff09\u3002",
  "discovererName": "Claudio Bozzato and Yves Younan of Cisco Talos",
  "formalWay": "\u76ee\u524d\u5382\u5546\u6682\u672a\u53d1\u5e03\u4fee\u590d\u63aa\u65bd\u89e3\u51b3\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u8f6f\u4ef6\u7684\u7528\u6237\u968f\u65f6\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u6216\u53c2\u8003\u7f51\u5740\u4ee5\u83b7\u53d6\u89e3\u51b3\u529e\u6cd5\uff1a\r\nhttps://www.grsecurity.net/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-16220",
  "openTime": "2019-06-02",
  "products": {
    "product": "PAX PaX"
  },
  "referenceLink": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0784",
  "serverity": "\u4e2d",
  "submitTime": "2019-05-29",
  "title": "PaX read_kmem\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2019-5023 (GCVE-0-2019-5023)

Vulnerability from cvelistv5 – Published: 2019-10-31 20:15 – Updated: 2024-08-04 19:40

Summary

An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.

Severity

5.9 (Medium)


                        
                          CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

CWE

CWE-401 - Improper Release of Memory Before Removing Last Reference

Assigner

talos mitre root

References

1 reference

URL	Tags
https://talosintelligence.com/vulnerability_repor…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	PaX	Affected: PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)

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JSON

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        "providerMetadata": {
          "dateUpdated": "2024-08-04T19:40:48.969Z",
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            "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784"
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        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
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          "product": "PaX",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)"
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        }
      ],
      "metrics": [
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          "cvssV3_0": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
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          "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784"
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                      "product_name": "PaX",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CNVD-2019-16220

CVE-2019-5023 (GCVE-0-2019-5023)

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