CVE-2016-8622
Quick assessment
Affected
The Curl Project curl
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.
Haxx libcurl是瑞典Haxx公司的一个免费、开源的客户端URL传输库。该库支持FTP、FTPS、TFTP、HTTP等。 Haxx libcurl 7.51.0之前版本中的‘URL percent-encoding decode’函数存在越界写入漏洞。攻击者可利用该漏洞绕过安全限制，执行未授权操作。
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I. Basic Information for CVE-2016-8622
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Haxx libcurl 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Haxx libcurl是瑞典Haxx公司的一个免费、开源的客户端URL传输库。该库支持FTP、FTPS、TFTP、HTTP等。 Haxx libcurl 7.51.0之前版本中的‘URL percent-encoding decode’函数存在越界写入漏洞。攻击者可利用该漏洞绕过安全限制，执行未授权操作。
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 |
|---|---|---|---|---|
| The Curl Project | curl | 7.51.0 | - |
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II. Public POCs for CVE-2016-8622
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2016-8622 (8)
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https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622 x_refsource_CONFIRM
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http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html x_refsource_CONFIRM
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Other References for CVE-2016-8622 (1)
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https://www.tenable.com/security/tns-2016-21 x_refsource_CONFIRM
Same Patch Batch · The Curl Project · 2018-07-31 · 5 CVEs total
| CVE-2016-8617 | Haxx curl 缓冲区错误漏洞 | |
| CVE-2016-8618 | Haxx curl 安全漏洞 | |
| CVE-2016-8621 | Haxx curl 缓冲区错误漏洞 | |
| CVE-2016-8624 | Haxx curl 输入验证错误漏洞 |
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V. Comments for CVE-2016-8622
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