cnvd - cnvd-2022-03910

cnvd-2022-03910

Vulnerability from cnvd

Title: Bundler代码注入漏洞

Description:

Bundler是一个用于在Ruby中管理应用程序依赖关系的包。通过跟踪和安装所需的确切gem和版本，为Ruby项目提供了一致的环境。

Bundler存在代码注入漏洞，该漏洞源于在使用Gemfile时，如果 Gemfile 包含 gem 条目并使git选项无效，攻击者通过构造特殊的文件内容可以导致恶意命令注入。

Severity: 高

Patch Name: Bundler代码注入漏洞的补丁

Patch Description:

Bundler是一个用于在Ruby中管理应用程序依赖关系的包。通过跟踪和安装所需的确切gem和版本，为Ruby项目提供了一致的环境。

Bundler存在代码注入漏洞，该漏洞源于在使用Gemfile时，如果 Gemfile 包含 gem 条目并使git选项无效，攻击者通过构造特殊的文件内容可以导致恶意命令注入。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://github.com/rubygems/rubygems/security/advisories/GHSA-fj7f-vq84-fh43

Reference: https://github.com/rubygems/rubygems/commit/a4f2f8ac17e6ce81c689527a8b6f14381060d95f

Impacted products

Name
Bundler Bundler <2.2.33

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-43809",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-43809"
    }
  },
  "description": "Bundler\u662f\u4e00\u4e2a\u7528\u4e8e\u5728Ruby\u4e2d\u7ba1\u7406\u5e94\u7528\u7a0b\u5e8f\u4f9d\u8d56\u5173\u7cfb\u7684\u5305\u3002\u901a\u8fc7\u8ddf\u8e2a\u548c\u5b89\u88c5\u6240\u9700\u7684\u786e\u5207gem\u548c\u7248\u672c\uff0c\u4e3aRuby\u9879\u76ee\u63d0\u4f9b\u4e86\u4e00\u81f4\u7684\u73af\u5883\u3002\n\nBundler\u5b58\u5728\u4ee3\u7801\u6ce8\u5165\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u4f7f\u7528Gemfile\u65f6\uff0c\u5982\u679c Gemfile \u5305\u542b gem \u6761\u76ee\u5e76\u4f7fgit\u9009\u9879\u65e0\u6548\uff0c\u653b\u51fb\u8005\u901a\u8fc7\u6784\u9020\u7279\u6b8a\u7684\u6587\u4ef6\u5185\u5bb9\u53ef\u4ee5\u5bfc\u81f4\u6076\u610f\u547d\u4ee4\u6ce8\u5165\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://github.com/rubygems/rubygems/security/advisories/GHSA-fj7f-vq84-fh43",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2022-03910",
  "openTime": "2022-01-14",
  "patchDescription": "Bundler\u662f\u4e00\u4e2a\u7528\u4e8e\u5728Ruby\u4e2d\u7ba1\u7406\u5e94\u7528\u7a0b\u5e8f\u4f9d\u8d56\u5173\u7cfb\u7684\u5305\u3002\u901a\u8fc7\u8ddf\u8e2a\u548c\u5b89\u88c5\u6240\u9700\u7684\u786e\u5207gem\u548c\u7248\u672c\uff0c\u4e3aRuby\u9879\u76ee\u63d0\u4f9b\u4e86\u4e00\u81f4\u7684\u73af\u5883\u3002\r\n\r\nBundler\u5b58\u5728\u4ee3\u7801\u6ce8\u5165\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u4f7f\u7528Gemfile\u65f6\uff0c\u5982\u679c Gemfile \u5305\u542b gem \u6761\u76ee\u5e76\u4f7fgit\u9009\u9879\u65e0\u6548\uff0c\u653b\u51fb\u8005\u901a\u8fc7\u6784\u9020\u7279\u6b8a\u7684\u6587\u4ef6\u5185\u5bb9\u53ef\u4ee5\u5bfc\u81f4\u6076\u610f\u547d\u4ee4\u6ce8\u5165\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": "Bundler\u4ee3\u7801\u6ce8\u5165\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Bundler Bundler \u003c2.2.33"
  },
  "referenceLink": "https://github.com/rubygems/rubygems/commit/a4f2f8ac17e6ce81c689527a8b6f14381060d95f",
  "serverity": "\u9ad8",
  "submitTime": "2021-12-12",
  "title": "Bundler\u4ee3\u7801\u6ce8\u5165\u6f0f\u6d1e"
}

CVE-2021-43809 (GCVE-0-2021-43809)

Vulnerability from cvelistv5

Published

2021-12-08 18:50

Modified

2024-08-04 04:03

Severity ?

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

CWE

CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Summary

`Bundler` is a package for managing application dependencies in Ruby. In `bundler` versions before 2.2.33, when working with untrusted and apparently harmless `Gemfile`'s, it is not expected that they lead to execution of external code, unless that's explicit in the ruby code inside the `Gemfile` itself. However, if the `Gemfile` includes `gem` entries that use the `git` option with invalid, but seemingly harmless, values with a leading dash, this can be false. To handle dependencies that come from a Git repository instead of a registry, Bundler uses various commands, such as `git clone`. These commands are being constructed using user input (e.g. the repository URL). When building the commands, Bundler versions before 2.2.33 correctly avoid Command Injection vulnerabilities by passing an array of arguments instead of a command string. However, there is the possibility that a user input starts with a dash (`-`) and is therefore treated as an optional argument instead of a positional one. This can lead to Code Execution because some of the commands have options that can be leveraged to run arbitrary executables. Since this value comes from the `Gemfile` file, it can contain any character, including a leading dash. To exploit this vulnerability, an attacker has to craft a directory containing a `Gemfile` file that declares a dependency that is located in a Git repository. This dependency has to have a Git URL in the form of `-u./payload`. This URL will be used to construct a Git clone command but will be interpreted as the upload-pack argument. Then this directory needs to be shared with the victim, who then needs to run a command that evaluates the Gemfile, such as `bundle lock`, inside. This vulnerability can lead to Arbitrary Code Execution, which could potentially lead to the takeover of the system. However, the exploitability is very low, because it requires a lot of user interaction. Bundler 2.2.33 has patched this problem by inserting `--` as an argument before any positional arguments to those Git commands that were affected by this issue. Regardless of whether users can upgrade or not, they should review any untrustred `Gemfile`'s before running any `bundler` commands that may read them, since they can contain arbitrary ruby code.

References

▼	URL	Tags
	https://github.com/rubygems/rubygems/security/advisories/GHSA-fj7f-vq84-fh43	x_refsource_CONFIRM
	https://github.com/rubygems/rubygems/pull/5142	x_refsource_MISC
	https://github.com/rubygems/rubygems/commit/0fad1ccfe9dd7a3c5b82c1496df3c2b4842870d3	x_refsource_MISC
	https://github.com/rubygems/rubygems/commit/a4f2f8ac17e6ce81c689527a8b6f14381060d95f	x_refsource_MISC
	https://www.sonarsource.com/blog/securing-developer-tools-package-managers/	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	rubygems	rubygems	Version: < 2.2.33

Show details on NVD website

JSON

To clipboard

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  "containers": {
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          "dateUpdated": "2024-08-04T04:03:08.862Z",
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              "type": "CWE"
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        "discovery": "UNKNOWN"
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    "state": "PUBLISHED"
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}

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.

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