CVE-2021-45960
Quick assessment
Affected
n/a n/a
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Expat是一款使用C语言编写的快速流式XML解析器。 Expat 存在安全漏洞，该漏洞源于在2.4.3之前的Expat(又名libexpat)中，xmlparse.c中的storeAtts函数左移29(或更多)位可能会导致realloc错误行为(例如，分配的字节太少，或只释放内存)。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-45960
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Expat 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Expat是一款使用C语言编写的快速流式XML解析器。 Expat 存在安全漏洞，该漏洞源于在2.4.3之前的Expat(又名libexpat)中，xmlparse.c中的storeAtts函数左移29(或更多)位可能会导致realloc错误行为(例如，分配的字节太少，或只释放内存)。
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 |
|---|---|---|---|---|
| - | n/a | n/a | - |
|
II. Public POCs for CVE-2021-45960
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | None | https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2021-45960 | POC Details |
| 2 | None | https://github.com/Trinadh465/external_lib_AOSP10_r33_CVE-2021-45960_CVE-2021-46143- | POC Details |
| 3 | None | https://github.com/hshivhare67/external_expat_v2.2.6_CVE-2021-45960 | POC Details |
AI-Generated POC
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Patches & Fixes for CVE-2021-45960 (1)
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https://github.com/libexpat/libexpat/pull/534 x_refsource_MISC
Vendor Advisories for CVE-2021-45960 (5)
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https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf x_refsource_CONFIRM
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https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 x_refsource_MISC
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https://security.netapp.com/advisory/ntap-20220121-0004/ x_refsource_CONFIRM
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Mailing List Discussions for CVE-2021-45960 (1)
Other References for CVE-2021-45960 (2)
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https://www.tenable.com/security/tns-2022-05 x_refsource_CONFIRM
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https://github.com/libexpat/libexpat/issues/531 x_refsource_MISC
Same Patch Batch · n/a · 2022-01-01 · 10 CVEs total
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| CVE-2021-45972 | Giftrans 缓冲区错误漏洞 | |
| CVE-2021-44852 | Biostar RACING GT Evo 安全漏洞 | |
| CVE-2021-43333 | Datalogic Dxu Service 访问控制错误漏洞 | |
| CVE-2021-41817 | Ruby 安全漏洞 | |
| CVE-2021-41819 | Ruby 安全漏洞 | |
| CVE-2021-44716 | Google Golang 资源管理错误漏洞 | |
| CVE-2021-44717 | Google Golang 资源管理错误漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-45960
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