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CVE-2022-31139— No security checking for UnsafeAccess.getInstance() in UnsafeAccessor

Quick assessment

Affected
Karlatemp UnsafeAccessor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UnsafeAccessor是微莹·纤绫（Karlatemp）个人开发者的一个不安全的访问器。用作访问 jdk.internal.misc.Unsafe & sun.misc.Unsafe 的桥梁。 UnsafeAccessor 1.4.0 到 1.7.0 版本存在信息泄露漏洞，该漏洞源于当设置了 SecurityCheck.AccessLimiter 时，不受信任的用户也可以不受限制地访问 UA。

CVSS 5.9 · Medium EPSS 1.14% · P65
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I. Basic Information for CVE-2022-31139

Vulnerability Information
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Vulnerability Title
No security checking for UnsafeAccess.getInstance() in UnsafeAccessor
Source: CVE Program / CVE List V5
Vulnerability Description
UnsafeAccessor (UA) is a bridge to access jdk.internal.misc.Unsafe & sun.misc.Unsafe. Normally, if UA is loaded as a named module, the internal data of UA is protected by JVM and others can only access UA via UA's standard API. The main application can set up `SecurityCheck.AccessLimiter` for UA to limit access to UA. Starting with version 1.4.0 and prior to version 1.7.0, when `SecurityCheck.AccessLimiter` is set up, untrusted code can access UA without limitation, even when UA is loaded as a named module. This issue does not affect those for whom `SecurityCheck.AccessLimiter` is not set up. Version 1.7.0 contains a patch.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
UnsafeAccessor 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UnsafeAccessor是微莹·纤绫（Karlatemp）个人开发者的一个不安全的访问器。用作访问 jdk.internal.misc.Unsafe & sun.misc.Unsafe 的桥梁。 UnsafeAccessor 1.4.0 到 1.7.0 版本存在信息泄露漏洞，该漏洞源于当设置了 SecurityCheck.AccessLimiter 时，不受信任的用户也可以不受限制地访问 UA。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Karlatemp UnsafeAccessor >= 1.4.0, < 1.7.0 -

II. Public POCs for CVE-2022-31139

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III. Intelligence Information for CVE-2022-31139

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Patches & Fixes for CVE-2022-31139 (1)

Vendor Advisories for CVE-2022-31139 (1)

Other References for CVE-2022-31139 (1)

IV. Related Vulnerabilities

Same weakness: CWE-200

V. Comments for CVE-2022-31139

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