Vulnerability-Lookup

CNVD-2020-38785

Vulnerability from cnvd - Published: 2020-07-14

Title

FreeBSD CPU资源消耗漏洞

Description

FreeBSD是由Core Team团队负责的FreeBSD项目中的一套类Unix自由操作系统，是经过BSD、386BSD和4.4BSD发展而来的类Unix的一个重要分支。 FreeBSD 11.2-RELEASE-p1之前版本、11.1-RELEASE-p12之前版本和10.4-RELEASE-p10之前版本中存在安全漏洞，该漏洞源于带有TCP段的数据结构使用了不合理的算法来重组数据。攻击者可利用该漏洞通过发送TCP流量利用该漏洞降低用户系统的网络性能和/或消耗大量CPU。

Severity

中

Patch Name

FreeBSD CPU资源消耗漏洞的补丁

Patch Description

Formal description

厂商已发布漏洞修复程序，请及时关注更新： https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc

Reference

https://securitytracker.com/id/1041425

Impacted products

Name
['Freebsd Freebsd <11.2-RELEASE-p1', 'Freebsd Freebsd <11.1-RELEASE-p12', 'Freebsd Freebsd <10.4-RELEASE-p10']

Show details on source website

JSON

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    "cve": {
      "cveNumber": "CVE-2018-6922"
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  "number": "CNVD-2020-38785",
  "openTime": "2020-07-14",
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  "patchName": "FreeBSD CPU\u8d44\u6e90\u6d88\u8017\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
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      "Freebsd Freebsd \u003c10.4-RELEASE-p10"
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  "serverity": "\u4e2d",
  "submitTime": "2018-08-07",
  "title": "FreeBSD CPU\u8d44\u6e90\u6d88\u8017\u6f0f\u6d1e"
}

CVE-2018-6922 (GCVE-0-2018-6922)

Vulnerability from cvelistv5 – Published: 2018-08-09 18:00 – Updated: 2024-09-16 17:53

Summary

One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.

Severity

No CVSS data available.

CWE

CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')

Assigner

freebsd mitre root

References

5 references

URL	Tags
https://www.freebsd.org/security/advisories/FreeB…	vendor-advisoryx_refsource_FREEBSD
http://www.securitytracker.com/id/1041425	vdb-entryx_refsource_SECTRACK
https://www.oracle.com/technetwork/security-advis…	x_refsource_CONFIRM
http://www.securityfocus.com/bid/105058	vdb-entryx_refsource_BID
https://security.netapp.com/advisory/ntap-2018081…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: All versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10

Date Public

2018-08-08 00:00

Show details on NVD website

JSON

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        "references": [
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            "name": "FreeBSD-SA-18:08",
            "tags": [
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            "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"
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        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
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          "versions": [
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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.

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.

Action not permitted

CNVD-2020-38785

CVE-2018-6922 (GCVE-0-2018-6922)

Tags

Sightings

Nomenclature

Related by attack behaviour