Debian: 'gnupg' vulnerabilities

    Date25 Dec 2000
    CategoryDebian
    2726
    Posted ByLinuxSecurity Advisories
    Two bugs in GnuPG have recently been found:
    
    - ------------------------------------------------------------------------
    Debian Security Advisory DSA-010-1                   This email address is being protected from spambots. You need JavaScript enabled to view it. 
    http://www.debian.org/security/                         Wichert Akkerman
    December 25, 2000
    - ------------------------------------------------------------------------
    
    
    Package        : gnupg
    Problem type   : cheating with detached signatures,
                     circumvention of web of trust
    Debian-specific: no
    
    Two bugs in GnuPG have recently been found:
    
    1. false positives when verifying detached signatures
    - -----------------------------------------------------
    
    There is a problem in the way gpg checks detached signatures which
    can lead to false positives. Detached signature can be verified
    with a command like this:
    
         gpg --verify detached.sig < mydata
    
    If someone replaced detached.sig with a signed text (ie not a
    detached signature) and then modified mydata gpg would still
    report a successfully verified signature.
    
    To fix the way the --verify option works has been changes: it now
    needs two options when verifying detached signatures: both the file
    with the detached signature, and the file with the data to be
    verified. Please note that this makes it incompatible with older
    versions! 
    
    2. secret keys are silently imported
    - ------------------------------------
    
    Florian Weimer discovered that gpg would import secret keys from
    key-servers. Since gpg considers public keys corresponding to
    known secret keys to be ultimately trusted an attacked can use this
    circumvent the web of trust.
    
    To fix this a new option was added to to tell gpg it is allowed
    to import secret keys: --allow-key-import.
    
    
    Both these fixes are in version 1.0.4-1.1 and we recommend that you
    upgrade your gnupg package immediately.
    
    wget url
            will fetch the file for you
    dpkg -i file.deb
            will install the referenced file.
    
    
    Debian GNU/Linux 2.2 alias potato
    - ---------------------------------
    
      Potato was released for alpha, arm, i386, m68k, powerpc and sparc.
    
      Source archives:
         http://security.debian.org/dists/stable/updates/main/source/gnupg_1.0.4-1.1.diff.gz
          MD5 checksum: 3e6a792f3bbb566650ea37a286feedf4
         http://security.debian.org/dists/stable/updates/main/source/gnupg_1.0.4-1.1.dsc
          MD5 checksum: 866059ad036f47c59bad9e5c3a0f0749
         http://security.debian.org/dists/stable/updates/main/source/gnupg_1.0.4.orig.tar.gz
          MD5 checksum: bef2267bfe9b74a00906a78db34437f9
    
      Alpha architecture:
         http://security.debian.org/dists/stable/updates/main/binary-alpha/gnupg_1.0.4-1.1_alpha.deb
          MD5 checksum: 616e391a4eb5561bf32714e40bed38c5
    
      ARM architecture:
         http://security.debian.org/dists/stable/updates/main/binary-arm/gnupg_1.0.4-1.1_arm.deb
          MD5 checksum: e496f7aed98098feef2869be81b774b7
    
      Intel ia32 architecture:
         http://security.debian.org/dists/stable/updates/main/binary-i386/gnupg_1.0.4-1.1_i386.deb
          MD5 checksum: a6c0494c737250b0ccc7dc33056d8e7c
    
      Motorola 680x0 architecture:
         http://security.debian.org/dists/stable/updates/main/binary-m68k/gnupg_1.0.4-1.1_m68k.deb
          MD5 checksum: a07cbf5bce2890fe85cfae4d796c5b0d
    
      PowerPC architecture:
         http://security.debian.org/dists/stable/updates/main/binary-powerpc/gnupg_1.0.4-1.1_powerpc.deb
          MD5 checksum: e251364c24066cc88a3de11b4ba23275
    
      Sun Sparc architecture:
         http://security.debian.org/dists/stable/updates/main/binary-sparc/gnupg_1.0.4-1.1_sparc.deb
          MD5 checksum: b15f4ad07949fb0fa24a221b656691ae
    
      These files will be moved into
       ftp://ftp.debian.org/debian/dists/stable/*/binary-$arch/ soon.
    
    For not yet released architectures please refer to the appropriate
    directory  ftp://ftp.debian.org/debian/dists/sid/binary-$arch/ .
    
    - -- 
    - ----------------------------------------------------------------------------
    apt-get: deb  http://security.debian.org/ stable/updates main
    dpkg-ftp:  ftp://security.debian.org/debian-security dists/stable/updates/main
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