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Create security section. Add CVE for Dropbear SSH.

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This commit is contained in:
Andris Raugulis 2016-09-08 18:50:19 +03:00
parent 13d945d8df
commit 243e4db74f
1 changed files with 53 additions and 5 deletions
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52
ssh-audit.py
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@ -242,6 +242,13 @@ class SSH(object):
def os(self):
return self.__os
def version_between(self, vfrom, vtill):
if vfrom and vfrom > self.version:
return False
if vtill and vtill < self.version:
return False
return True
def __str__(self):
out = '{0} '.format(self.vendor) if self.vendor else ''
out += self.product
@ -386,6 +393,21 @@ class SSH(object):
comments = (mx.group(4) or '').strip() or None
return cls(protocol, software, comments)
class Security(object):
CVE = {
'Dropbear SSH': [
['0.44', '2015.71', 'CVE-2016-3116', 5.5, 'bypass command restrictions via xauth command injection.'],
['0.28', '2013.58', 'CVE-2013-4434', 5.0, 'discover valid usernames through different time delays.'],
['0.28', '2013.58', 'CVE-2013-4421', 5.0, 'cause DoS (memory consumption) via a compressed packet.'],
['0.52', '2011.54', 'CVE-2012-0920', 7.1, 'execute arbitrary code or bypass command restrictions.'],
['0.40', '0.48.1', 'CVE-2007-1099', 7.5, 'conduct a MitM attack (no warning for hostkey mismatch).'],
['0.28', '0.47', 'CVE-2006-1206', 7.5, 'cause DoS (slot exhaustion) via large number of connections.'],
['0.39', '0.47', 'CVE-2006-0225', 4.6, 'execute arbitrary commands via scp with crafted filenames.'],
['0.28', '0.46', 'CVE-2005-4178', 6.5, 'execute arbitrary code via buffer overflow vulnerability.'],
['0.28', '0.42', 'CVE-2004-2486', 7.5, 'execute arbitrary code via DSS verification code.'],
]
}
class Socket(ReadBuf, WriteBuf):
SM_BANNER_SENT = 1
@ -800,6 +822,28 @@ def output_compatibility(kex, client=False):
out.good('(gen) compatibility: ' + ', '.join(comp_text))
def output_security_cve(software, padlen):
if software is None or software.product not in SSH.Security.CVE:
return
for line in SSH.Security.CVE[software.product]:
vfrom, vtill = line[0:2]
if not software.version_between(vfrom, vtill):
continue
cve, cvss, descr = line[2:5]
padding = ' ' * (padlen - len(cve))
out.fail('(cve) {0}{1} -- ({2}) {3}'.format(cve, padding, cvss, descr))
def output_security(banner, padlen):
with OutputBuffer() as obuf:
software = SSH.Software.parse(banner)
output_security_cve(software, padlen)
if len(obuf) > 0:
out.head('# security')
obuf.flush()
out.sep()
def output(banner, header, kex):
with OutputBuffer() as obuf:
if len(header) > 0:
@ -823,13 +867,17 @@ def output(banner, header, kex):
out.head('# general')
obuf.flush()
out.sep()
if kex is None:
return
if kex is not None:
ml = lambda l: max(len(i) for i in l)
maxlen = max(ml(kex.kex_algorithms),
ml(kex.key_algorithms),
ml(kex.server.encryption),
ml(kex.server.mac))
else:
maxlen = 0
output_security(banner, maxlen)
if kex is None:
return
title, alg_type = 'key exchange algorithms', 'kex'
output_algorithms(title, alg_type, kex.kex_algorithms, maxlen)
title, alg_type = 'host-key algorithms', 'key'