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Arch Linux: ASA-202103-42 Low: ecryptfs-utils Update for Salt Hard-Coding

The package ecryptfs-utils before version 106-1 is vulnerable to hard-coded passphrase salt that may ease a brute-force attack. . Arch Linux Security Advisory ASA-201503-14 ========================================= Severity: Low Date : 2015-03-17 CVE-ID : CVE-2014-9687 Package : ecryptfs-utils Type : hard-coded passphrase salt Remote : No Link : https://wiki.archlinux.org/title/CVE Summary ====== The package ecryptfs-utils before version 106-1 is vulnerable to hard-coded passphrase salt that may ease a brute-force attack. Resolution ========= Upgrade to 106-1. # pacman -Syu "ecryptfs-utils> =106-1" The problem has been fixed upstream in version 106. If pam_ecryptfs is used a transparent migration from version 1 to version 2 files is provided, otherwise a manual re-wrapping of the passphrase file is mandatory. Workaround ========= None. Description ========== eCryptfs uses a default salt to encrypt the mount passphrase, which makes it easier for attackers to obtain user passwords via a brute force attack. By default, the wrapping key is hashed with the default fixed salt (0x0011223344556677). This update introduces the version 2 wrapped-passphrase file format. It adds the ability to combine a randomly generated salt with the wrapping password (typically, a user's login password) prior to performing key strengthening. The version 2 file format is considered to be a intermediate step in strengthening the wrapped-passphrase files of existing encrypted home/private users. If pam_ecryptfs is used a transparent migration from version 1 to version 2 files is provided, otherwise a manual re-wrapping of the passphrase file is mandatory. Impact ===== An attacker could use this issue to discover the login password used to protect the mount passphrase and gain unintended access to the encrypted files with the help of bulk dictionary attacks and rainbow tables to crack userpasswords. References ========= https://www.openwall.com/lists/oss-security/2015/02/10/10 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-9687 https://bugs.archlinux.org/task/44157 . Gentoo Linux notice regarding libxml2 vulnerability stemming from insufficient input validation, severity medium, confirmed exploit availability.. Arch Linux,ecryptfs-utils,hard-coded salt,brute-force attack,security advisory. . Severity: Low. LinuxSecurity.com Team

Mar 17, 2015 •Low ArchLinux