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Message-ID: <20150417131008.GE17615@ucc.gu.uwa.edu.au>
Date: Fri, 17 Apr 2015 21:10:08 +0800
From: Matt Johnston <matt@....asn.au>
To: musl@...ts.openwall.com
Subject: Re: Security advisory for musl libc - stack-based buffer overflow in
ipv6 literal parsing [CVE-2015-1817]
Hi,
I think Dropbear probably is vulnerable to CVE-2015-1817
post-authentication. TCP forwarding requests will call
getaddrinfo()
https://secure.ucc.asn.au/hg/dropbear/file/cbd674d63cd4/dbutil.c#l415
(moved to netio.c in head, and PF_UNSPEC has been fixed to
AF_UNSPEC). Pre-authentication should be OK, only
getnameinfo() is called (if that's enabled).
musl's network-facing DNS code seems a bit precarious with
pointer arithmetic?
Please CC replies, I'm not subscribed.
Cheers,
Matt
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