glsa-200504-04.xml


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200504-04">
  <title>mit-krb5: Multiple buffer overflows in telnet client</title>
  <synopsis>
    The mit-krb5 telnet client is vulnerable to two buffer overflows, which
    could allow a malicious telnet server operator to execute arbitrary code.
  </synopsis>
  <product type="ebuild">telnet</product>
  <announced>2005-04-06</announced>
  <revised count="01">2005-04-06</revised>
  <bug>87145</bug>
  <access>remote</access>
  <affected>
    <package name="app-crypt/mit-krb5" auto="yes" arch="*">
      <unaffected range="ge">1.3.6-r2</unaffected>
      <vulnerable range="lt">1.3.6-r2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    The MIT Kerberos 5 implementation provides a command line telnet
    client which is used for remote login via the telnet protocol.
    </p>
  </background>
  <description>
    <p>
    A buffer overflow has been identified in the env_opt_add()
    function, where a response requiring excessive escaping can cause a
    heap-based buffer overflow. Another issue has been identified in the
    slc_add_reply() function, where a large number of SLC commands can
    overflow a fixed size buffer.
    </p>
  </description>
  <impact type="normal">
    <p>
    Successful exploitation would require a vulnerable user to connect
    to an attacker-controlled telnet host, potentially executing arbitrary
    code with the permissions of the telnet user on the client.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All mit-krb5 users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=app-crypt/mit-krb5-1.3.6-r2"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468">CAN-2005-0468</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469">CAN-2005-0469</uri>
    <uri link="http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2005-001-telnet.txt">MITKRB5-SA-2005-001</uri>
  </references>
  <metadata tag="submitter" timestamp="2005-04-01T09:42:26Z">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="2005-04-06T09:05:02Z">
    koon
  </metadata>
</glsa>