Vulnerability-Lookup

CNVD-2019-26412

Vulnerability from cnvd - Published: 2019-08-08

Title

systemd信任管理问题漏洞

Description

systemd是德国Lennart Poettering软件开发者的一款基于Linux的系统和服务管理器。该产品兼容了SysV和LSB的启动脚本，且提供了一个用来表示系统服务间依赖关系的框架。 systemd 242版本中存在信任管理问题漏洞，该漏洞源于网络系统或产品中缺乏有效的信任管理机制，攻击者可利用默认密码或者硬编码密码、硬编码证书等攻击受影响组件。

Severity

中

Patch Name

systemd信任管理问题漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f

Reference

https://web.nvd.nist.gov//vuln/detail/CVE-2018-20839 http://www.securityfocus.com/bid/108389

Impacted products

Name
systemd systemd 242

Show details on source website

JSON

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{
  "bids": {
    "bid": {
      "bidNumber": "108389"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-20839",
      "cveUrl": "http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20839"
    }
  },
  "description": "systemd\u662f\u5fb7\u56fdLennart Poettering\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u6b3e\u57fa\u4e8eLinux\u7684\u7cfb\u7edf\u548c\u670d\u52a1\u7ba1\u7406\u5668\u3002\u8be5\u4ea7\u54c1\u517c\u5bb9\u4e86SysV\u548cLSB\u7684\u542f\u52a8\u811a\u672c\uff0c\u4e14\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7528\u6765\u8868\u793a\u7cfb\u7edf\u670d\u52a1\u95f4\u4f9d\u8d56\u5173\u7cfb\u7684\u6846\u67b6\u3002\n\nsystemd 242\u7248\u672c\u4e2d\u5b58\u5728\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u7edc\u7cfb\u7edf\u6216\u4ea7\u54c1\u4e2d\u7f3a\u4e4f\u6709\u6548\u7684\u4fe1\u4efb\u7ba1\u7406\u673a\u5236\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u9ed8\u8ba4\u5bc6\u7801\u6216\u8005\u786c\u7f16\u7801\u5bc6\u7801\u3001\u786c\u7f16\u7801\u8bc1\u4e66\u7b49\u653b\u51fb\u53d7\u5f71\u54cd\u7ec4\u4ef6\u3002",
  "discovererName": "Thomas Carlisle",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-26412",
  "openTime": "2019-08-08",
  "patchDescription": "systemd\u662f\u5fb7\u56fdLennart Poettering\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u6b3e\u57fa\u4e8eLinux\u7684\u7cfb\u7edf\u548c\u670d\u52a1\u7ba1\u7406\u5668\u3002\u8be5\u4ea7\u54c1\u517c\u5bb9\u4e86SysV\u548cLSB\u7684\u542f\u52a8\u811a\u672c\uff0c\u4e14\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7528\u6765\u8868\u793a\u7cfb\u7edf\u670d\u52a1\u95f4\u4f9d\u8d56\u5173\u7cfb\u7684\u6846\u67b6\u3002\r\n\r\nsystemd 242\u7248\u672c\u4e2d\u5b58\u5728\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u7edc\u7cfb\u7edf\u6216\u4ea7\u54c1\u4e2d\u7f3a\u4e4f\u6709\u6548\u7684\u4fe1\u4efb\u7ba1\u7406\u673a\u5236\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u9ed8\u8ba4\u5bc6\u7801\u6216\u8005\u786c\u7f16\u7801\u5bc6\u7801\u3001\u786c\u7f16\u7801\u8bc1\u4e66\u7b49\u653b\u51fb\u53d7\u5f71\u54cd\u7ec4\u4ef6\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": "systemd\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "systemd systemd 242"
  },
  "referenceLink": "https://web.nvd.nist.gov//vuln/detail/CVE-2018-20839\r\nhttp://www.securityfocus.com/bid/108389",
  "serverity": "\u4e2d",
  "submitTime": "2019-05-17",
  "title": "systemd\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2018-20839 (GCVE-0-2018-20839)

Vulnerability from cvelistv5 – Published: 2019-05-17 03:39 – Updated: 2024-08-05 12:12

Summary

systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

6 references

URL	Tags
https://bugs.launchpad.net/ubuntu/+source/systemd…	x_refsource_MISC
https://github.com/systemd/systemd/commit/9725f1a…	x_refsource_MISC
https://github.com/systemd/systemd/pull/12378	x_refsource_MISC
http://www.securityfocus.com/bid/108389	vdb-entryx_refsource_BID
https://security.netapp.com/advisory/ntap-2019053…	x_refsource_CONFIRM
https://lists.apache.org/thread.html/rf9fa47ab664…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CNVD-2019-26412

CVE-2018-20839 (GCVE-0-2018-20839)

Tags

Sightings

Nomenclature

Related by attack behaviour