Bug 1869639 (CVE-2020-26154)

Summary: CVE-2020-26154 libproxy: sending more than 102400 bytes in PAC without a Content-Length present could result in buffer overflow
Product: [Other] Security Response Reporter: Michael Kaplan <mkaplan>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: amigadave, danw, i, igor.raits, npmccallum, scorneli
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Bug Depends On: 1883584, 1884639    
Bug Blocks: 1869641    

Description Michael Kaplan 2020-08-18 12:20:23 UTC
It was found that if the server serving a PAC file sends more than 102400 bytes without a Content-Length present, libproxy can overflow its buffer by PAC_HTTP_BLOCK_SIZE (512) bytes.

References:

https://github.com/libproxy/libproxy/pull/126
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=968366

Comment 2 Stefan Cornelius 2020-09-29 15:55:02 UTC
Created libproxy tracking bugs for this issue:

Affects: fedora-all [bug 1883584]