1 |
py 07/11/20 21:15:25 |
2 |
|
3 |
Added: glsa-200711-29.xml |
4 |
Log: |
5 |
GLSA 200711-29 |
6 |
|
7 |
Revision Changes Path |
8 |
1.1 xml/htdocs/security/en/glsa/glsa-200711-29.xml |
9 |
|
10 |
file : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/security/en/glsa/glsa-200711-29.xml?rev=1.1&view=markup |
11 |
plain: http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/security/en/glsa/glsa-200711-29.xml?rev=1.1&content-type=text/plain |
12 |
|
13 |
Index: glsa-200711-29.xml |
14 |
=================================================================== |
15 |
<?xml version="1.0" encoding="utf-8"?> |
16 |
<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?> |
17 |
<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?> |
18 |
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
19 |
|
20 |
<glsa id="200711-29"> |
21 |
<title>Samba: Execution of arbitrary code</title> |
22 |
<synopsis> |
23 |
Samba contains two buffer overflow vulnerabilities potentially resulting in |
24 |
the execution of arbitrary code, one of which is currently unfixed. |
25 |
</synopsis> |
26 |
<product type="ebuild">samba</product> |
27 |
<announced>November 20, 2007</announced> |
28 |
<revised>November 20, 2007: 01</revised> |
29 |
<bug>197519</bug> |
30 |
<access>remote</access> |
31 |
<affected> |
32 |
<package name="net-fs/samba" auto="yes" arch="*"> |
33 |
<unaffected range="ge">3.0.26a-r2</unaffected> |
34 |
<vulnerable range="lt">3.0.26a-r2</vulnerable> |
35 |
</package> |
36 |
</affected> |
37 |
<background> |
38 |
<p> |
39 |
Samba is a suite of SMB and CIFS client/server programs for UNIX. |
40 |
</p> |
41 |
</background> |
42 |
<description> |
43 |
<p> |
44 |
Two vulnerabilities have been reported in nmbd. Alin Rad Pop (Secunia |
45 |
Research) discovered a boundary checking error in the |
46 |
reply_netbios_packet() function which could lead to a stack-based |
47 |
buffer overflow (CVE-2007-5398). The Samba developers discovered a |
48 |
boundary error when processing GETDC logon requests also leading to a |
49 |
buffer overflow (CVE-2007-4572). |
50 |
</p> |
51 |
</description> |
52 |
<impact type="high"> |
53 |
<p> |
54 |
To exploit the first vulnerability a remote unauthenticated attacker |
55 |
could send specially crafted WINS "Name Registration" requests followed |
56 |
by a WINS "Name Query" request. This might lead to execution of |
57 |
arbitrary code with elevated privileges. Note that this vulnerability |
58 |
is exploitable only when WINS server support is enabled in Samba. The |
59 |
second vulnerability could be exploited by sending specially crafted |
60 |
"GETDC" mailslot requests, but requires Samba to be configured as a |
61 |
Primary or Backup Domain Controller. It is not believed the be |
62 |
exploitable to execute arbitrary code. |
63 |
</p> |
64 |
</impact> |
65 |
<workaround> |
66 |
<p> |
67 |
To work around the first vulnerability, disable WINS support in Samba |
68 |
by setting "<i>wins support = no</i>" in the "global" section of your |
69 |
smb.conf and restart Samba. |
70 |
</p> |
71 |
</workaround> |
72 |
<resolution> |
73 |
<p> |
74 |
The Samba 3.0.27 ebuild that resolves both vulnerabilities is currently |
75 |
masked due to a regression in the patch for the second vulnerability. |
76 |
</p> |
77 |
<p> |
78 |
Since no working patch exists yet, all Samba users should upgrade to |
79 |
3.0.26a-r2, which contains a fix for the first vulnerability |
80 |
(CVE-2007-5398): |
81 |
</p> |
82 |
<code> |
83 |
# emerge --sync |
84 |
# emerge --ask --oneshot --verbose ">=net-fs/samba-3.0.26a-r2"</code> |
85 |
<p> |
86 |
An update to this temporary GLSA will be sent when the second |
87 |
vulnerability will be fixed. |
88 |
</p> |
89 |
</resolution> |
90 |
<references> |
91 |
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4572">CVE-2007-4572</uri> |
92 |
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5398">CVE-2007-5398</uri> |
93 |
</references> |
94 |
<metadata tag="submitter" timestamp="Sat, 03 Nov 2007 23:37:14 +0000"> |
95 |
rbu |
96 |
</metadata> |
97 |
<metadata tag="bugReady" timestamp="Tue, 20 Nov 2007 21:13:02 +0000"> |
98 |
p-y |
99 |
</metadata> |
100 |
</glsa> |
101 |
|
102 |
|
103 |
|
104 |
-- |
105 |
gentoo-commits@g.o mailing list |