CVE-2025-49506— Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack
Quick assessment
Affected
Apache Software Foundation Apache Portable Runtime Utility
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.
Apache Portable Runtime Utility是美国Apache基金会开源的一个提供跨平台运行时接口的组件工具集。 Apache Portable Runtime Utility 1.6.3及之前版本存在侧信道信息泄露漏洞，该漏洞源于apr_password_validate()函数在哈希或密码比较时未采用常数时间算法，容易受到侧信道时序攻击，可能导致哈希或密码内容泄露。
Possible ATT&CK Techniques 1 AI
T1557 · Adversary-in-the-MiddleAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Portable Runtime Utility | 1.2.0≤ 1.6.3 |
affected |
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I. Basic Information for CVE-2025-49506
Vulnerability Information
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Vulnerability Title
Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack
Source: CVE Program / CVE List V5
Vulnerability Description
APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack particularly on platforms without crypt() such as Windows, BeOS, NetWare, or Android.
Users are recommended to upgrade to version 1.6.4, which fixes this issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
通过时间差异性导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Portable Runtime Utility 侧信道信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Portable Runtime Utility是美国Apache基金会开源的一个提供跨平台运行时接口的组件工具集。 Apache Portable Runtime Utility 1.6.3及之前版本存在侧信道信息泄露漏洞，该漏洞源于apr_password_validate()函数在哈希或密码比较时未采用常数时间算法，容易受到侧信道时序攻击，可能导致哈希或密码内容泄露。
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 |
|---|---|---|---|---|
| Apache Software Foundation | Apache Portable Runtime Utility | 1.2.0 ~ 1.6.3 | - |
|
II. Public POCs for CVE-2025-49506
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|---|
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Mailing List Discussions for CVE-2025-49506 (1)
Same Patch Batch · Apache Software Foundation · 2026-08-06 · 18 CVEs total
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| CVE-2026-54225 | Apache CXF: Denial of Service attack via large attachments | |
| CVE-2026-57819 | Apache CXF: No default restriction on the amount of form parameters per message | |
| CVE-2026-64958 | Apache CXF: Denial of service via message header attachments | |
| CVE-2026-66909 | Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage | |
| CVE-2026-57817 | Apache CXF: The authorization code hash (c_hash) is not enforced for the hybrid OIDC flow | |
| CVE-2026-65432 | Apache CXF: XXE via WSDL/XSD import parsing | |
| CVE-2026-68481 | Apache CXF: Revocation bypass in DefaultEncryptingOAuthDataProvider | |
| CVE-2026-32327 | Apache Portable Runtime Utility: apr-util XML stack recursion crash | |
| CVE-2026-65583 | Apache CXF: Self-issued ID token claims validation skipped | |
| CVE-2026-63687 | Apache CXF: JwtRequestCodeFilter silently overrides outer PKCE and nonce parameters | |
| CVE-2026-61466 | Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation | |
| CVE-2026-57818 | Apache CXF: OAuth2 Authorization Code Replay via TOCTOU in JCacheCodeDataProvider | |
| CVE-2026-34502 | Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client | |
| CVE-2026-34501 | Apache Portable Runtime Utility: Heap buffer overflow in APR redis client | |
| CVE-2026-34191 | Apache Portable Runtime Utility: SQL Injection in apr_dbd_oracle |
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V. Comments for CVE-2025-49506
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