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OpenSSH Buffer Exploit

Discussion in 'General Discussion' started by pirania1, Sep 16, 2003.

  1. pirania1

    pirania1 Well-Known Member

    May 10, 2003
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    Miami, FL
    Repost from RS forums

    OpenSSH Buffer Exploit
    Severity: CRITICAL

    There have been several reports of a new ssh bug, with an exploit seemingly in the wild.

    1. Versions affected:

    All versions of OpenSSH's sshd prior to 3.7 contain a buffer management error. The attack makes an enormous amount of ssh connections and attempts various offsets until it finds one that works permitting root login. Priv sep does *not* seem to stop the attack (unless its on OpenBSD). Hosts.allow/deny will stop it as will any very restrictive firewall rules.

    2. Solutions:

    If you do any of this, you do so at your own risk and I take no responsibility if you hose your box.

    Upgrade to OpenSSH 3.7 or use this patch

    Openssh 3.7p1 on the master ftp:

    For Debian stable users:
    apt-get update
    apt-get upgrade
    Debian Security List post

    For Redhat Users:
    Redhat has not *yet* released a patch however you can manually install the 3.7p1 or use the patch

    For Gentoo Users:
    This is a workaround since ebuild update isnt there yet
    cd /usr/portage/net-misc/openssh/
    cp openssh-3.6.1_p2.ebuild openssh-3.7_p1.ebuild
    emerge -f openssh-3.7_p1.ebuild
    ebuild openssh-3.7_p1.ebuild digest
    emerge openssh-3.7_p1.ebuild
    /etc/init.d/sshd restart

    Please note this is just a repost FYI. I do not answer questions about it, nor I take any responsibility.
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  2. sasha

    sasha Member

    Nov 5, 2002
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