Description
EncFS before 1.7.0 encrypts multiple blocks by means of the CFB cipher mode with the same initialization vector, which makes it easier for local users to obtain sensitive information via calculations involving recovery of XORed data, as demonstrated by an attack on encrypted data in which the last block contains only one byte.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | encfs | 1.7.2-1 | — |
| Debian 12 | encfs | 1.7.2-1 | — |
References
- 41158 third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=630460
- 41478 third-party-advisory
- FEDORA-2010-14268 vendor-advisory
- FEDORA-2010-14200 vendor-advisory
- 20100826 Multiple Vulnerabilities in EncFS mailing-list
- [oss-security] 20100905 CVE Request -- EncFS / fuse-encfs [three ids] -- Multiple Vulnerabilities in EncFS mailing-list
- [oss-security] 20100907 Re: CVE Request -- EncFS / fuse-encfs [three ids] -- Multiple Vulnerabilities in EncFS mailing-list
- [oss-security] 20100905 Re: CVE Request -- EncFS / fuse-encfs [three ids] -- Multiple Vulnerabilities in EncFS mailing-list
- ADV-2010-2414 vdb-entry
- http://www.arg0.net/encfs
- FEDORA-2010-14254 vendor-advisory