cnvd - cnvd-2021-26205

cnvd-2021-26205

Vulnerability from cnvd

Title: GNU C Library断言失败漏洞

Description:

GNU C Library (glibc)是一种按照LGPL许可协议发布的、开源、免费、方便从网络下载的C的编译程序。

GNU C Library 2.30至2.32版本中的iconv函数存在断言失败漏洞。攻击者可通过包含不可逆字符的UCS4文本利用该漏洞导致拒绝服务。

Severity: 低

Patch Name: GNU C Library断言失败漏洞的补丁

Patch Description:

GNU C Library (glibc)是一种按照LGPL许可协议发布的、开源、免费、方便从网络下载的C的编译程序。

GNU C Library 2.30至2.32版本中的iconv函数存在断言失败漏洞。攻击者可通过包含不可逆字符的UCS4文本利用该漏洞导致拒绝服务。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:

厂商已发布了漏洞修复程序，请及时关注更新： https://sourceware.org/pipermail/libc-alpha/2020-November/119822.html

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-29562

Impacted products

Name
Gnu GNU C Library >=2.30，<=2.32

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-29562",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-29562"
    }
  },
  "description": "GNU C Library (glibc)\u662f\u4e00\u79cd\u6309\u7167LGPL\u8bb8\u53ef\u534f\u8bae\u53d1\u5e03\u7684\u3001\u5f00\u6e90\u3001\u514d\u8d39\u3001\u65b9\u4fbf\u4ece\u7f51\u7edc\u4e0b\u8f7d\u7684C\u7684\u7f16\u8bd1\u7a0b\u5e8f\u3002\n\nGNU C Library 2.30\u81f32.32\u7248\u672c\u4e2d\u7684iconv\u51fd\u6570\u5b58\u5728\u65ad\u8a00\u5931\u8d25\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5305\u542b\u4e0d\u53ef\u9006\u5b57\u7b26\u7684UCS4\u6587\u672c\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://sourceware.org/pipermail/libc-alpha/2020-November/119822.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-26205",
  "openTime": "2021-04-09",
  "patchDescription": "GNU C Library (glibc)\u662f\u4e00\u79cd\u6309\u7167LGPL\u8bb8\u53ef\u534f\u8bae\u53d1\u5e03\u7684\u3001\u5f00\u6e90\u3001\u514d\u8d39\u3001\u65b9\u4fbf\u4ece\u7f51\u7edc\u4e0b\u8f7d\u7684C\u7684\u7f16\u8bd1\u7a0b\u5e8f\u3002\r\n\r\nGNU C Library 2.30\u81f32.32\u7248\u672c\u4e2d\u7684iconv\u51fd\u6570\u5b58\u5728\u65ad\u8a00\u5931\u8d25\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5305\u542b\u4e0d\u53ef\u9006\u5b57\u7b26\u7684UCS4\u6587\u672c\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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\u65ad\u8a00\u5931\u8d25\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Gnu GNU C Library \u003e=2.30\uff0c\u003c=2.32"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-29562",
  "serverity": "\u4f4e",
  "submitTime": "2020-12-07",
  "title": "GNU C Library\u65ad\u8a00\u5931\u8d25\u6f0f\u6d1e"
}

CVE-2020-29562 (GCVE-0-2020-29562)

Vulnerability from cvelistv5

Published

2020-12-04 06:48

Modified

2025-06-09 15:14

Severity ?

4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H

CWE

Summary

The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

References

▼	URL	Tags
	https://sourceware.org/bugzilla/show_bug.cgi?id=26923	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TVCUNLQ3HXGS4VPUQKWTJGRAW2KTFGXS/	vendor-advisory, x_refsource_FEDORA
	https://security.netapp.com/advisory/ntap-20210122-0004/	x_refsource_CONFIRM
	https://security.gentoo.org/glsa/202101-20	vendor-advisory, x_refsource_GENTOO
	https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E	mailing-list, x_refsource_MLIST

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T16:55:10.573Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=26923"
          },
          {
            "name": "FEDORA-2021-6e581c051a",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TVCUNLQ3HXGS4VPUQKWTJGRAW2KTFGXS/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210122-0004/"
          },
          {
            "name": "GLSA-202101-20",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202101-20"
          },
          {
            "name": "[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 4.8,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2020-29562",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-09T15:13:36.629969Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-617",
                "description": "CWE-617 Reachable Assertion",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-09T15:14:25.172Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-02-25T16:06:18.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=26923"
        },
        {
          "name": "FEDORA-2021-6e581c051a",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TVCUNLQ3HXGS4VPUQKWTJGRAW2KTFGXS/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210122-0004/"
        },
        {
          "name": "GLSA-202101-20",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202101-20"
        },
        {
          "name": "[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-29562",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://sourceware.org/bugzilla/show_bug.cgi?id=26923",
              "refsource": "MISC",
              "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=26923"
            },
            {
              "name": "FEDORA-2021-6e581c051a",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TVCUNLQ3HXGS4VPUQKWTJGRAW2KTFGXS/"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210122-0004/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210122-0004/"
            },
            {
              "name": "GLSA-202101-20",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202101-20"
            },
            {
              "name": "[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-29562",
    "datePublished": "2020-12-04T06:48:23.000Z",
    "dateReserved": "2020-12-04T00:00:00.000Z",
    "dateUpdated": "2025-06-09T15:14:25.172Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted