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CVE-2009-3720

Quick assessment

Affected
n/a n/a
Exploitation
High exploitation probability; assess promptly
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 2.0.1版本的libexpat模块中存在安全漏洞。当Expat在 Python,、PyXML、 w3c-libwww和其他软件中运行时，攻击者可以将包含UTF-8字符序列的特制XML文档作为libexpat模块中lib/xmltok_impl.c的updatePosition函数参数以触发buffer over-read，造成拒绝服务(应用程序崩溃)。

AI Predicted 5.3 Difficulty: Easy EPSS 27.92% · P98

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2009-3720

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625.
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 安全漏洞
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 2.0.1版本的libexpat模块中存在安全漏洞。当Expat在 Python,、PyXML、 w3c-libwww和其他软件中运行时，攻击者可以将包含UTF-8字符序列的特制XML文档作为libexpat模块中lib/xmltok_impl.c的updatePosition函数参数以触发buffer over-read，造成拒绝服务(应用程序崩溃)。
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-2009-3720

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III. Intelligence Information for CVE-2009-3720

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Vendor Advisories for CVE-2009-3720 (34)

Mailing List Discussions for CVE-2009-3720 (43)

Other References for CVE-2009-3720 (12)

Same Patch Batch · n/a · 2009-11-03 · 6 CVEs total

CVE-2009-3031 Symantec Altiris Product ActiveX控件栈溢出漏洞
CVE-2009-3298 Mahara 权限提升漏洞
CVE-2009-3299 Mahara "resume blocktype" 跨站脚本漏洞
CVE-2009-3851 Sun Solaris JDS ’xscreensaver(1)’本地信息泄露漏洞
CVE-2009-3852 IBM Runtimes for Java Technology XML组件未明漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2009-3720

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