Re: Attacks against SSH?

From: Jordan K Wiens (jwiensat_private)
Date: Tue Dec 04 2001 - 09:31:28 PST

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    ver>=2.3.0 of openssh patched the vulnerability
    
    http://razor.bindview.com/publish/advisories/adv_ssh1crc.html
    
    Also; here's a recent sanitized targets file for the x2 executable:
    
    -----begin targets-----
    SSH-1.5-1.2.27,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXX,0xXXXX,0
    Small - SSH-1.99-OpenSSH_2.2.0p1,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXX,0xXXXX,0
    Big - SSH-1.99-OpenSSH_2.2.0p1,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXXXXXXXX,0xXX,0xXXXX,1
    -----end targets-----
    
    -- 
    Jordan Wiens
    UF Network Incident Response Team
    (352)392-2061
    
    On Tue, 4 Dec 2001 johan.augustssonat_private wrote:
    
    > "f.johan.beisser" wrote:
    >
    > > i tested out a binary exploit that "supposedly" worked on OpenSSH 2.3 to
    > > 3.0 (but not 3.0.1p1), and had it fail each time. it aparently does attack
    > > the CRC bug in unpatched/vulnerable versions of ssh.
    > >
    > > the exploit is (supposedly) encrypted, stripped, and for x86 linux. the
    > > binary has an md5 checksum of 1309689a9af6b82e11e8dfa5c6282c30. it's
    > > ruffly 1.4 megs in size. i've only seen it as "x2".
    >
    >
    > I know that the x2 binary uses a targetfile with some offsets for
    > different sshd. The one I've seen omly contains offsets for SSH-1.2.27
    > and OpenSSH-2.2.0p1. If this exploit really works against OpenSSH-2.9.9
    > you'll need a targetfile with the offsets for OpenSSH-2.9.9.
    >
    >
    > /Johan Augustsson
    >
    > --------------------------------------------------------------------
    > Johan Augustsson                 Phone: +46 (0)31 773 1000
    > Incident Response Team           Fax: +46 (0)31 773 1087
    > Göteborg University              E-mail: Johan.Augustssonat_private
    > Sweden
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