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Message-ID: <56C34D2A.9080708@treenet.co.nz>
Date: Wed, 17 Feb 2016 05:24:10 +1300
From: Amos Jeffries <squid3@...enet.co.nz>
To: oss-security@...ts.openwall.com
Subject: Re: Re: CVE request: Squid HTTP Caching Proxy 3.5.13,
4.0.4, 4.0.5 denial of service
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Hash: SHA1
On 17/02/2016 3:45 a.m., cve-assign@...re.org wrote:
>> http://www.squid-cache.org/Advisories/SQUID-2016_1.txt
>
>> Patch for 3.5 is
>> <http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-1398
1.patch>.
>
>> Patch for 4.0 is
>> <http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-1398
1.patch>.
>
> Is this correct or do you mean the 4.0 patch is
> http://www.squid-cache.org/Versions/v4/changesets/squid-4-14538.patch
instead?
>
Paste error on my part sorry.
The squid-4-14538.patch URL is correct for 4.0.
>
>> A remotely triggerable denial of service has been found in Squid
>> proxy. The proxy incorrectly handles server TLS failure which almost
>> always results in crashing the entire proxy. Denying service for all
>> other clients using it.
>
>> Bug 4437: Fix Segfault on Certain SSL Handshake Errors
>
>> Squid after an unsuccessful try to connect to the remote server may
make two
>> concurrent retries to connect to the remote SSL server, calling twi
ce the
>> FwdState::retryOrBail() method, which may result to unexpected beha
viour.
>
>> Prevent this by just closing the connection to the remote SSL serve
r inside
>> FwdState::connectedToPeer method on error and instead of calling th
e
>> FwdState::retryOrBail method, just allow comm_close handler to retr
y the
>> connection if required.
>
>> src/FwdState.cc
>
> Use CVE-2016-2390.
>
>
Thank you.
Amos
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