Vulnerability-Lookup

CNVD-2021-30869

Vulnerability from cnvd - Published: 2021-04-26

Title

Apache Tapestry代码执行漏洞

Description

Apache Tapestry是美国阿帕奇（Apache）基金会的一款使用Java语言编写的Web应用程序框架。 Apache Tapestry存在安全漏洞，攻击者可利用该漏洞可以通过请求URL"http： localhost：8080 assets something services AppModule.class"下载文件"AppModule.class"，该URL包含一个HMAC密钥。

Severity

高

Patch Name

Apache Tapestry代码执行漏洞的补丁

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://lists.apache.org/thread.html/r237ff7f286bda31682c254550c1ebf92b0ec61329b32fbeb2d1c8751%40%3Cusers.tapestry.apache.org%3E

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-27850

Impacted products

Name
['Apache Tapestry 5.4.5', 'Apache Tapestry 5.5.0', 'Apache Tapestry 5.6.2', 'Apache Tapestry 5.7.0']

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-27850"
    }
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  "description": "Apache Tapestry\u662f\u7f8e\u56fd\u963f\u5e15\u5947\uff08Apache\uff09\u57fa\u91d1\u4f1a\u7684\u4e00\u6b3e\u4f7f\u7528Java\u8bed\u8a00\u7f16\u5199\u7684Web\u5e94\u7528\u7a0b\u5e8f\u6846\u67b6\u3002\n\nApache Tapestry\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53ef\u4ee5\u901a\u8fc7\u8bf7\u6c42URL\"http\uff1a localhost\uff1a8080 assets something services AppModule.class\"\u4e0b\u8f7d\u6587\u4ef6\"AppModule.class\"\uff0c\u8be5URL\u5305\u542b\u4e00\u4e2aHMAC\u5bc6\u94a5\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://lists.apache.org/thread.html/r237ff7f286bda31682c254550c1ebf92b0ec61329b32fbeb2d1c8751%40%3Cusers.tapestry.apache.org%3E",
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  "number": "CNVD-2021-30869",
  "openTime": "2021-04-26",
  "patchDescription": "Apache Tapestry\u662f\u7f8e\u56fd\u963f\u5e15\u5947\uff08Apache\uff09\u57fa\u91d1\u4f1a\u7684\u4e00\u6b3e\u4f7f\u7528Java\u8bed\u8a00\u7f16\u5199\u7684Web\u5e94\u7528\u7a0b\u5e8f\u6846\u67b6\u3002\r\n\r\nApache Tapestry\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53ef\u4ee5\u901a\u8fc7\u8bf7\u6c42URL\"http\uff1a localhost\uff1a8080 assets something services AppModule.class\"\u4e0b\u8f7d\u6587\u4ef6\"AppModule.class\"\uff0c\u8be5URL\u5305\u542b\u4e00\u4e2aHMAC\u5bc6\u94a5\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": "Apache Tapestry\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u7684\u8865\u4e01",
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  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-27850",
  "serverity": "\u9ad8",
  "submitTime": "2021-04-16",
  "title": "Apache Tapestry\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e"
}

CVE-2021-27850 (GCVE-0-2021-27850)

Vulnerability from cvelistv5 – Published: 2021-04-15 07:40 – Updated: 2024-08-03 21:33

Title

Bypass of the fix for CVE-2019-0195

Summary

A critical unauthenticated remote code execution vulnerability was found all recent versions of Apache Tapestry. The affected versions include 5.4.5, 5.5.0, 5.6.2 and 5.7.0. The vulnerability I have found is a bypass of the fix for CVE-2019-0195. Recap: Before the fix of CVE-2019-0195 it was possible to download arbitrary class files from the classpath by providing a crafted asset file URL. An attacker was able to download the file `AppModule.class` by requesting the URL `http://localhost:8080/assets/something/services/AppModule.class` which contains a HMAC secret key. The fix for that bug was a blacklist filter that checks if the URL ends with `.class`, `.properties` or `.xml`. Bypass: Unfortunately, the blacklist solution can simply be bypassed by appending a `/` at the end of the URL: `http://localhost:8080/assets/something/services/AppModule.class/` The slash is stripped after the blacklist check and the file `AppModule.class` is loaded into the response. This class usually contains the HMAC secret key which is used to sign serialized Java objects. With the knowledge of that key an attacker can sign a Java gadget chain that leads to RCE (e.g. CommonsBeanUtils1 from ysoserial). Solution for this vulnerability: * For Apache Tapestry 5.4.0 to 5.6.1, upgrade to 5.6.2 or later. * For Apache Tapestry 5.7.0, upgrade to 5.7.1 or later.

Severity

No CVSS data available.

CWE

CWE-200 - Information Exposure
CWE-502 - Deserialization of Untrusted Data

Assigner

apache mitre root

References

3 references

URL	Tags
https://lists.apache.org/thread.html/r237ff7f286b…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/04/15/1	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021052…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tapestry	Affected: Apache Tapestry 5.5.0 Affected: Apache Tapestry 5.7.0 Affected: Apache Tapestry 5.4.5 , < Apache Tapestry 5.4.0* (custom) Affected: Apache Tapestry 5.6.2 , < Apache Tapestry 5.6.0* (custom)

Credits

Apache Tapestry would like to thank Johannes Moritz for finding and notifying this vulnerability

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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.

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.