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Insecure Library Loading

Secunia Advisory SA38427

cURL / libcURL Excessive Data Length in Callback Function
Secunia Advisory SA38427
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Release Date 2010-02-09
Last Update 2010-03-26
   
Popularity 2,797 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact DoS
System access
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Patch
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
Remediation status Secunia CSI, Secunia PSI
Automated scanning Secunia CSI, Secunia PSI
   
Software:
cURL 7.x

Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2010-0734 CVSS available in Customer Area
  

Description

A security issue has been reported in cURL / libcURL, which can potentially be exploited by malicious people to cause a DoS (Denial of Service) or compromise an application using the library.

The security issue is caused due to an error when returning data to the registered callback function for downloading compressed content over HTTP. The library may send back up to 64Kb of data to the callback function, exceeding the documented maximum data size of 16Kb (CURL_MAX_WRITE_SIZE). This can potentially lead to buffer overflows in client applications.

NOTE: This only affects zlib-enabled builds where automatic decompression has been enabled (disabled by default).

The security issue affects curl and libcurl versions 7.10.5 through 7.19.7.


Solution
Update to version 7.20.0 or apply the patch.
Further details available in Customer Area

Provided and/or discovered by
The vendor credits Wesley Miaw.

Changelog
Further details available in Customer Area

Original Advisory
http://curl.haxx.se/docs/adv_20100209.html

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: cURL / libcURL Excessive Data Length in Callback Function
 
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