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Mandriva Advisories

Package name fetchmail
Date May 17th, 2007
Advisory ID MDKSA-2007:105
Affected versions CS3.0, 2007.0, CS4.0, 2007.1
Synopsis Updated fetchmail packages fix potential APOP vulnerabilities

Problem Description

The APOP functionality in fetchmail's POP3 client implementation was
validating the APOP challenge too lightly, accepting random garbage
as a POP3 server's APOP challenge, rather than insisting it conform
to RFC-822 specifications.

As a result of this flaw, it made man-in-the-middle attacks easier than
necessary to retrieve the first few characters of the APOP secret,
allowing them to potentially brute force the remaining characters
easier than should be possible.

Updated packages have been patched to prevent these issues, however it
should be noted that the APOP MD5-based authentication scheme should
no longer be considered secure.

Updated Packages

Corporate Server 3.0

 6f317ee0374b4a932e419f16cc217cd3  corporate/3.0/i586/fetchmail-6.2.5-3.5.C30mdk.i586.rpm
 76bd1c16d25316642b06cef0a731361c  corporate/3.0/i586/fetchmail-daemon-6.2.5-3.5.C30mdk.i586.rpm
 b8be2f61aafaba91cecc261fa0f39f3f  corporate/3.0/i586/fetchmailconf-6.2.5-3.5.C30mdk.i586.rpm 
 6ecd14b3000639124b09715267449b10  corporate/3.0/SRPMS/fetchmail-6.2.5-3.5.C30mdk.src.rpm

Corporate Server 3.0/X86_64

 ab17fb41441c61eddd678b285e4c65ca  corporate/3.0/x86_64/fetchmail-6.2.5-3.5.C30mdk.x86_64.rpm
 493179e57b94b1167576b4ba81f53e4f  corporate/3.0/x86_64/fetchmail-daemon-6.2.5-3.5.C30mdk.x86_64.rpm
 1d08906af873ad1023947558027e25c7  corporate/3.0/x86_64/fetchmailconf-6.2.5-3.5.C30mdk.x86_64.rpm 
 6ecd14b3000639124b09715267449b10  corporate/3.0/SRPMS/fetchmail-6.2.5-3.5.C30mdk.src.rpm

Mandriva Linux 2007

 c2ac4014b50aa7ca037eb513a22ef02f  2007.0/i586/fetchmail-6.3.4-3.2mdv2007.0.i586.rpm
 c199ee31b527efd3175d7ed1e7839901  2007.0/i586/fetchmail-daemon-6.3.4-3.2mdv2007.0.i586.rpm
 f3b508c9c0da1153129c915ac4f1fc02  2007.0/i586/fetchmailconf-6.3.4-3.2mdv2007.0.i586.rpm 
 1a9051dcf0dde7cdacd5e9f322cc3b5c  2007.0/SRPMS/fetchmail-6.3.4-3.2mdv2007.0.src.rpm

Mandriva Linux 2007/X86_64

 7226a9c8d3ce66fc011b91433bfc8803  2007.0/x86_64/fetchmail-6.3.4-3.2mdv2007.0.x86_64.rpm
 4a7d05a3a4148d00d91614b1536c9871  2007.0/x86_64/fetchmail-daemon-6.3.4-3.2mdv2007.0.x86_64.rpm
 f9c2b0ae0a4390742d371f05c3fe7ec3  2007.0/x86_64/fetchmailconf-6.3.4-3.2mdv2007.0.x86_64.rpm 
 1a9051dcf0dde7cdacd5e9f322cc3b5c  2007.0/SRPMS/fetchmail-6.3.4-3.2mdv2007.0.src.rpm

Corporate Server 4.0

 4dcceb3f61790ea207d25a4bcd5d6b5c  corporate/4.0/i586/fetchmail-6.2.5-11.4.20060mlcs4.i586.rpm
 cc5d060a877c61ce2bf15e9fa4a51694  corporate/4.0/i586/fetchmail-daemon-6.2.5-11.4.20060mlcs4.i586.rpm
 2341bb3e1c08c2c43adcfccebb14b4bc  corporate/4.0/i586/fetchmailconf-6.2.5-11.4.20060mlcs4.i586.rpm 
 3cb2cd26ed758afcda29bd7ee95d8f1b  corporate/4.0/SRPMS/fetchmail-6.2.5-11.4.20060mlcs4.src.rpm

Corporate Server 4.0/X86_64

 dcf89b5f7423dd135b18bcd2bb91e9b4  corporate/4.0/x86_64/fetchmail-6.2.5-11.4.20060mlcs4.x86_64.rpm
 61a5262f41f1b92cf9ac8e57389f4097  corporate/4.0/x86_64/fetchmail-daemon-6.2.5-11.4.20060mlcs4.x86_64.rpm
 1f22ad5a19a85edc0d0f1e89a4b25e77  corporate/4.0/x86_64/fetchmailconf-6.2.5-11.4.20060mlcs4.x86_64.rpm 
 3cb2cd26ed758afcda29bd7ee95d8f1b  corporate/4.0/SRPMS/fetchmail-6.2.5-11.4.20060mlcs4.src.rpm

Mandriva Linux 2007.1

 d462eecd17cf6ae0b6d6647d33f2d585  2007.1/i586/fetchmail-6.3.6-1.1mdv2007.1.i586.rpm
 9d575e6618f47924b9e8c01f650e1829  2007.1/i586/fetchmail-daemon-6.3.6-1.1mdv2007.1.i586.rpm
 40b2e12dabe589d0daef1524f29bfbcf  2007.1/i586/fetchmailconf-6.3.6-1.1mdv2007.1.i586.rpm 
 4c34025ce19a4527150ffbae18e2f310  2007.1/SRPMS/fetchmail-6.3.6-1.1mdv2007.1.src.rpm

Mandriva Linux 2007.1/X86_64

 14fa8c254251a4aa3b1d0a5925fc18d4  2007.1/x86_64/fetchmail-6.3.6-1.1mdv2007.1.x86_64.rpm
 b96d1020981b2f778cdd9c69f20b8421  2007.1/x86_64/fetchmail-daemon-6.3.6-1.1mdv2007.1.x86_64.rpm
 a2d2ed808460d970bf2f3eeb7dd69336  2007.1/x86_64/fetchmailconf-6.3.6-1.1mdv2007.1.x86_64.rpm 
 4c34025ce19a4527150ffbae18e2f310  2007.1/SRPMS/fetchmail-6.3.6-1.1mdv2007.1.src.rpm

References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1558
http://www.fetchmail.info/fetchmail-SA-2007-01.txt

Upgrade

To upgrade automatically, use MandrivaUpdate.


Verification

Please verify the update prior to upgrading to ensure the integrity of the downloaded package. You can do this with the command :

                rpm --checksig package.rpm

You can get the GPG public key of the Mandriva Security Team to verify the GPG signature of each RPM.

If you use MandrivaUpdate, the verification of md5 checksum and GPG signature is performed automatically for you.