SB2013112012 - Cryptographic issues in Linux kernel
Published: November 20, 2013 Updated: August 10, 2020
Security Bulletin ID
SB2013112012
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Cryptographic issues (CVE-ID: CVE-2013-4579)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The ath9k_htc_set_bssid_mask function in drivers/net/wireless/ath/ath9k/htc_drv_main.c in the Linux kernel through 3.12 uses a BSSID masking approach to determine the set of MAC addresses on which a Wi-Fi device is listening, which allows remote attackers to discover the original MAC address after spoofing by sending a series of packets to MAC addresses with certain bit manipulations.
Remediation
Install update from vendor's website.
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=729573
- http://www.mathyvanhoef.com/2013/11/unmasking-spoofed-mac-address.html
- http://www.openwall.com/lists/oss-security/2013/11/15/3
- http://www.ubuntu.com/usn/USN-2113-1
- http://www.ubuntu.com/usn/USN-2117-1
- http://www.ubuntu.com/usn/USN-2133-1
- http://www.ubuntu.com/usn/USN-2134-1
- http://www.ubuntu.com/usn/USN-2135-1
- http://www.ubuntu.com/usn/USN-2136-1
- http://www.ubuntu.com/usn/USN-2138-1
- http://www.ubuntu.com/usn/USN-2139-1
- http://www.ubuntu.com/usn/USN-2141-1
- https://lists.ath9k.org/pipermail/ath9k-devel/2013-November/012215.html