Vulnerability-Lookup

CNVD-2021-101180

Vulnerability from cnvd - Published: 2021-12-21

Title

GNU C Library存在未明漏洞

Description

GNU C Library（glibc，libc6）是一种按照LGPL许可协议发布的开源免费的C语言编译程序。 GNU C Library (又名 glibc) 2.34版本存在安全漏洞，该漏洞源于受影响版本库中iconvdata/iso-2022-jp-3.c的iconv()存在数据校验问题。攻击者可利用该漏洞通过精心制作的ISO-2022-JP-3数据强制iconv()发出一个虚假的0字符，并伴随着内部状态重置。在某些iconv()用例中，这可能会影响数据完整性。

Severity

中

Patch Name

GNU C Library存在未明漏洞的补丁

Patch Description

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://sourceware.org/bugzilla/show_bug.cgi?id=28524

Reference

https://sourceware.org/bugzilla/show_bug.cgi?id=28524

Impacted products

Name
GNU C Library 2.34

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2021-43396"
    }
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  "description": "GNU C Library\uff08glibc\uff0clibc6\uff09\u662f\u4e00\u79cd\u6309\u7167LGPL\u8bb8\u53ef\u534f\u8bae\u53d1\u5e03\u7684\u5f00\u6e90\u514d\u8d39\u7684C\u8bed\u8a00\u7f16\u8bd1\u7a0b\u5e8f\u3002\n\nGNU C Library (\u53c8\u540d glibc) 2.34\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u53d7\u5f71\u54cd\u7248\u672c\u5e93\u4e2diconvdata/iso-2022-jp-3.c\u7684iconv()\u5b58\u5728\u6570\u636e\u6821\u9a8c\u95ee\u9898\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u7cbe\u5fc3\u5236\u4f5c\u7684ISO-2022-JP-3\u6570\u636e\u5f3a\u5236iconv()\u53d1\u51fa\u4e00\u4e2a\u865a\u5047\u76840\u5b57\u7b26\uff0c\u5e76\u4f34\u968f\u7740\u5185\u90e8\u72b6\u6001\u91cd\u7f6e\u3002\u5728\u67d0\u4e9biconv()\u7528\u4f8b\u4e2d\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u6570\u636e\u5b8c\u6574\u6027\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://sourceware.org/bugzilla/show_bug.cgi?id=28524",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-101180",
  "openTime": "2021-12-21",
  "patchDescription": "GNU C Library\uff08glibc\uff0clibc6\uff09\u662f\u4e00\u79cd\u6309\u7167LGPL\u8bb8\u53ef\u534f\u8bae\u53d1\u5e03\u7684\u5f00\u6e90\u514d\u8d39\u7684C\u8bed\u8a00\u7f16\u8bd1\u7a0b\u5e8f\u3002\r\n\r\nGNU C Library (\u53c8\u540d glibc) 2.34\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u53d7\u5f71\u54cd\u7248\u672c\u5e93\u4e2diconvdata/iso-2022-jp-3.c\u7684iconv()\u5b58\u5728\u6570\u636e\u6821\u9a8c\u95ee\u9898\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u7cbe\u5fc3\u5236\u4f5c\u7684ISO-2022-JP-3\u6570\u636e\u5f3a\u5236iconv()\u53d1\u51fa\u4e00\u4e2a\u865a\u5047\u76840\u5b57\u7b26\uff0c\u5e76\u4f34\u968f\u7740\u5185\u90e8\u72b6\u6001\u91cd\u7f6e\u3002\u5728\u67d0\u4e9biconv()\u7528\u4f8b\u4e2d\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u6570\u636e\u5b8c\u6574\u6027\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": "GNU C Library\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "GNU C Library 2.34"
  },
  "referenceLink": "https://sourceware.org/bugzilla/show_bug.cgi?id=28524",
  "serverity": "\u4e2d",
  "submitTime": "2021-11-08",
  "title": "GNU C Library\u5b58\u5728\u672a\u660e\u6f0f\u6d1e"
}

CVE-2021-43396 (GCVE-0-2021-43396)

Vulnerability from cvelistv5 – Published: 2021-11-04 19:52 – Updated: 2024-08-04 03:55 Disputed

Summary

In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states "the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root Scorecard

References

4 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=28524	x_refsource_MISC
https://sourceware.org/git/?p=glibc.git%3Ba=commi…	x_refsource_MISC
https://blog.tuxcare.com/vulnerability/vulnerabil…	x_refsource_MISC
https://www.oracle.com/security-alerts/cpujul2022.html

Show details on NVD website

JSON

To clipboard

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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.

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Action not permitted

CNVD-2021-101180

CVE-2021-43396 (GCVE-0-2021-43396)

Tags

Sightings

Nomenclature

Related by attack behaviour