Vulnerability-Lookup

CNVD-2020-63630

Vulnerability from cnvd - Published: 2020-11-16

Title

SDDM竞争条件问题漏洞

Description

SDDM是SSDM团队的一款基于Qt的桌面环境KDE和LXQt的显示管理器。 SDDM 0.19.0之前的版本中存在竞争条件问题漏洞。该漏洞源于错误地启动X服务器，而这种方式会在短时间内允许本地非特权用户创建与X服务器的连接，而无需提供适当的身份验证。本地攻击者可以访问X服务器的显示内容。

Severity

低

Patch Name

SDDM竞争条件问题漏洞的补丁

Patch Description

SDDM是SSDM团队的一款基于Qt的桌面环境KDE和LXQt的显示管理器。 SDDM 0.19.0之前的版本中存在竞争条件问题漏洞。该漏洞源于错误地启动X服务器，而这种方式会在短时间内允许本地非特权用户创建与X服务器的连接，而无需提供适当的身份验证。本地攻击者可以访问X服务器的显示内容。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/sddm/sddm/releases

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-28049

Impacted products

Name
SDDM SDDM <0.19.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-28049",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-28049"
    }
  },
  "description": "SDDM\u662fSSDM\u56e2\u961f\u7684\u4e00\u6b3e\u57fa\u4e8eQt\u7684\u684c\u9762\u73af\u5883KDE\u548cLXQt\u7684\u663e\u793a\u7ba1\u7406\u5668\u3002\n\nSDDM 0.19.0\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u9519\u8bef\u5730\u542f\u52a8X\u670d\u52a1\u5668\uff0c\u800c\u8fd9\u79cd\u65b9\u5f0f\u4f1a\u5728\u77ed\u65f6\u95f4\u5185\u5141\u8bb8\u672c\u5730\u975e\u7279\u6743\u7528\u6237\u521b\u5efa\u4e0eX\u670d\u52a1\u5668\u7684\u8fde\u63a5\uff0c\u800c\u65e0\u9700\u63d0\u4f9b\u9002\u5f53\u7684\u8eab\u4efd\u9a8c\u8bc1\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u4ee5\u8bbf\u95eeX\u670d\u52a1\u5668\u7684\u663e\u793a\u5185\u5bb9\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/sddm/sddm/releases",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-63630",
  "openTime": "2020-11-16",
  "patchDescription": "SDDM\u662fSSDM\u56e2\u961f\u7684\u4e00\u6b3e\u57fa\u4e8eQt\u7684\u684c\u9762\u73af\u5883KDE\u548cLXQt\u7684\u663e\u793a\u7ba1\u7406\u5668\u3002\r\n\r\nSDDM 0.19.0\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u9519\u8bef\u5730\u542f\u52a8X\u670d\u52a1\u5668\uff0c\u800c\u8fd9\u79cd\u65b9\u5f0f\u4f1a\u5728\u77ed\u65f6\u95f4\u5185\u5141\u8bb8\u672c\u5730\u975e\u7279\u6743\u7528\u6237\u521b\u5efa\u4e0eX\u670d\u52a1\u5668\u7684\u8fde\u63a5\uff0c\u800c\u65e0\u9700\u63d0\u4f9b\u9002\u5f53\u7684\u8eab\u4efd\u9a8c\u8bc1\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u4ee5\u8bbf\u95eeX\u670d\u52a1\u5668\u7684\u663e\u793a\u5185\u5bb9\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "SDDM\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "SDDM SDDM \u003c0.19.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-28049",
  "serverity": "\u4f4e",
  "submitTime": "2020-11-05",
  "title": "SDDM\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-28049 (GCVE-0-2020-28049)

Vulnerability from cvelistv5 – Published: 2020-11-04 00:00 – Updated: 2024-10-15 18:10

Summary

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation.

Severity

6.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-15 17:16 UTC

CWE

n/a
CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

mitre mitre root

References

8 references

URL	Tags
https://github.com/sddm/sddm/releases
https://bugzilla.suse.com/show_bug.cgi?id=CVE-202…
https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog
https://www.debian.org/security/2020/dsa-4783	vendor-advisory
https://lists.debian.org/debian-lts-announce/2020…	mailing-list
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202402-02	vendor-advisory

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-04T16:33:56.915Z",
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            "url": "https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog"
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            "tags": [
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            "name": "FEDORA-2021-7066b95c99",
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/"
          },
          {
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        "metrics": [
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              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "NONE",
              "baseScore": 6.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
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          },
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            "other": {
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                "options": [
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                "role": "CISA Coordinator",
                "timestamp": "2024-10-15T17:16:10.736062Z",
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        "problemTypes": [
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    "cna": {
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      "problemTypes": [
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      "references": [
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          "url": "https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog"
        },
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        },
        {
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          "tags": [
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          "tags": [
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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-2020-63630

CVE-2020-28049 (GCVE-0-2020-28049)

Tags

Sightings

Nomenclature

Related by attack behaviour