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List of products vulnerable to insecure library loading vulnerabilities:
http://secunia.com/_%22insecure%20library%20loading%22

The list is continuously updated as we confirm the vulnerability reports
so check back regularly too see if any of your apps are affected.


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TITLE:
EncFS Multiple Weaknesses

SECUNIA ADVISORY ID:
SA41158

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/41158/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=41158

RELEASE DATE:
2010-08-30

DISCUSS ADVISORY:
http://secunia.com/advisories/41158/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/41158/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=41158

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Micha Riser has reported some weaknesses in EncFS, which can be
exploited by malicious people to bypass certain security features.

1) The application uses only 4 bytes as initialisation vector
although 8 bytes are intended, which can lead to e.g. lower
cryptographic security than expected.

2) The application does not properly protect against "watermarking"
attacks when using the CBC mode, which can be exploited to e.g.
determine if a specially crafted file has been stored.

3) When using CFB cipher mode, cipher blocks containing a single byte
can disclose certain information about the file content to the
attacker.

The weaknesses are reported in versions prior to 1.7. Other versions
may also be affected.

SOLUTION:
Update to version 1.7, which fixes weaknesses #1 and #2 by using a
different initialisation vector setup code for new file systems. Use
the "MAC block headers" or "MAC random bytes" options to mitigate the
CFB cipher mode attacks.

PROVIDED AND/OR DISCOVERED BY:
Micha Riser

ORIGINAL ADVISORY:
Micha Riser:
http://archives.neohapsis.com/archives/fulldisclosure/2010-08/0316.html

EncFS:
http://www.arg0.net/encfs#TOC-Change-Log

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
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