Vulnerability-Lookup

CNVD-2021-05132

Vulnerability from cnvd - Published: 2021-01-22

Title

Linux kernel路径遍历漏洞（CNVD-2021-05132）

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 5.10.7之前版本存在安全漏洞，该漏洞源于drivers/target/target_core_xcopy.c标识符检查不足，攻击者可利用该漏洞通过XCOPY请求中的目录遍历来读写文件。

Severity

中

Patch Name

Linux kernel路径遍历漏洞（CNVD-2021-05132）的补丁

Patch Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 5.10.7之前版本存在安全漏洞，该漏洞源于drivers/target/target_core_xcopy.c标识符检查不足，攻击者可利用该漏洞通过XCOPY请求中的目录遍历来读写文件。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/torvalds/linux/commit/2896c93811e39d63a4d9b63ccf12a8fbc226e5e4

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-28374

Impacted products

Name
Linux Linux kernel <5.10.7

Show details on source website

JSON

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    "cve": {
      "cveNumber": "CVE-2020-28374",
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  "number": "CNVD-2021-05132",
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  "serverity": "\u4e2d",
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}

CVE-2020-28374 (GCVE-0-2020-28374)

Vulnerability from cvelistv5 – Published: 2021-01-13 03:07 – Updated: 2024-08-04 16:33

Summary

In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can be used by remote attackers to read or write files via directory traversal in an XCOPY request, aka CID-2896c93811e3. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. The attacker gains control over file access because I/O operations are proxied via an attacker-selected backstore.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

15 references

URL	Tags
https://bugzilla.suse.com/show_bug.cgi?id=1178372	x_refsource_MISC
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan…	x_refsource_CONFIRM
https://github.com/torvalds/linux/commit/2896c938…	x_refsource_CONFIRM
https://git.kernel.org/cgit/linux/kernel/git/torv…	x_refsource_CONFIRM
https://bugzilla.suse.com/attachment.cgi?id=844938	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/01/13/2	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/01/13/5	mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://packetstormsecurity.com/files/161229/Kerne…	x_refsource_MISC
https://www.debian.org/security/2021/dsa-4843	vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021021…	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST

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JSON

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    "datePublished": "2021-01-13T03:07:45.000Z",
    "dateReserved": "2020-11-10T00:00:00.000Z",
    "dateUpdated": "2024-08-04T16:33:59.044Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.