CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
EPSS
Percentile
92.6%
The remote Windows host is affected by a cross-site scripting (XSS) vulnerability in Skype for Business and Lync clients due to improper sanitization of message content before returning it to the user. A remote attacker can exploit this, using specially crafted JavaScript, to execute arbitrary script and HTML in the user’s context, resulting in the possible disclosure of sensitive information or other actions.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(86849);
script_version("1.12");
script_cvs_date("Date: 2018/11/15 20:50:31");
script_cve_id("CVE-2015-6061");
script_bugtraq_id(77477);
script_xref(name:"MSFT", value:"MS15-123");
script_xref(name:"MSKB", value:"3085634");
script_xref(name:"MSKB", value:"3101496");
script_xref(name:"MSKB", value:"3096735");
script_xref(name:"MSKB", value:"3096736");
script_xref(name:"MSKB", value:"3096738");
script_xref(name:"IAVA", value:"2015-A-0279");
script_name(english:"MS15-123: Security Update for Skype for Business and Microsoft Lync to Address Information Disclosure (3105872)");
script_summary(english:"Checks the file versions.");
script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a cross-site scripting vulnerability.");
script_set_attribute(attribute:"description", value:
"The remote Windows host is affected by a cross-site scripting (XSS)
vulnerability in Skype for Business and Lync clients due to improper
sanitization of message content before returning it to the user. A
remote attacker can exploit this, using specially crafted JavaScript,
to execute arbitrary script and HTML in the user's context, resulting
in the possible disclosure of sensitive information or other actions.");
script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2015/ms15-123");
script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Lync 2010, Lync 2010
Attendee, Lync 2013, Lync Basic 2013, Skype for Business 2016, Skype
for Business Basic 2016, and Lync Room System.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2015/11/10");
script_set_attribute(attribute:"patch_publication_date", value:"2015/11/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/11/11");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:lync");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:lync_basic");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:lync_room_system");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:skype_for_business");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows : Microsoft Bulletins");
script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");
script_dependencies("smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl", "office_installed.nasl", "microsoft_lync_server_installed.nasl");
script_require_keys("SMB/MS_Bulletin_Checks/Possible");
script_require_ports(139, 445, "Host/patch_management_checks");
exit(0);
}
include("audit.inc");
include("smb_func.inc");
include("smb_hotfixes.inc");
include("smb_hotfixes_fcheck.inc");
include("smb_reg_query.inc");
include("misc_func.inc");
include("install_func.inc");
get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');
global_var bulletin, vuln, arch;
arch = get_kb_item_or_exit('SMB/ARCH');
vuln = 0;
bulletin = 'MS15-123';
kbs = make_list(
'3085634', # Skype For Biz 2016
'3101496', # Lync 2013 (Skype for Biz)
'3096735', # Lync 2010
'3096736', # Lync 2010 Attendee (User Level)
'3096738' # Lync 2010 Attendee (Admin Level)
);
if (get_kb_item('Host/patch_management_checks')) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_WARNING);
get_kb_item_or_exit("SMB/Registry/Enumerated");
get_kb_item_or_exit('SMB/WindowsVersion', exit_code:1);
if (hotfix_check_sp_range(vista:'2', win7:'1', win8:'0', win81:'0', win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);
share = hotfix_get_systemdrive(exit_on_fail:TRUE, as_share:TRUE);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);
# Lync checks
function perform_lync_checks()
{
local_var lync_count, lync_installs, lync_install;
lync_count = get_install_count(app_name:"Microsoft Lync");
# Nothing to do
if (int(lync_count) <= 0)
return;
lync_installs = get_installs(app_name:"Microsoft Lync");
foreach lync_install (lync_installs[1])
{
if (lync_install["version"] =~ "^4\.0\." && "Server" >!< lync_install["Product"])
{
# Lync 2010
if ("Attendee" >!< lync_install["Product"])
{
if (hotfix_check_fversion(file:"communicator.exe", version:"4.0.7577.4484", min_version:"4.0.0.0", path:lync_install["path"], bulletin:bulletin, kb:"3096735", product:"Microsoft Lync 2010") == HCF_OLDER)
vuln++;
}
# Lync 2010 Attendee
else if ("Attendee" >< lync_install["Product"])
{
if ("user level" >< tolower(lync_install["Product"])) # User
{
if (hotfix_check_fversion(file:"MeetingJoinAxAOC.DLL", version:"4.0.7577.4484", min_version:"4.0.0.0", path:lync_install["path"], bulletin:bulletin, kb:"3096736", product:lync_install["Product"]) == HCF_OLDER)
vuln++;
}
else # Admin
{
if (hotfix_check_fversion(file:"MeetingJoinAxAOC.DLL", version:"4.0.7577.4484", min_version:"4.0.0.0", path:lync_install["path"], bulletin:bulletin, kb:"3096738", product:lync_install["Product"]) == HCF_OLDER)
vuln++;
}
}
}
# Lync 2013
else if (lync_install["version"] =~ "^15\.0\." && "Server" >!< lync_install["Product"])
{
if (hotfix_check_fversion(file:"Lync.exe", version:"15.0.4771.1001", min_version:"15.0.4569.1503", path:lync_install["path"], bulletin:bulletin, kb:"3101496", product:"Microsoft Lync 2013 (Skype for Business)") == HCF_OLDER)
vuln++;
}
# Skype for Business 2016
else if (lync_install["version"] =~ "^16\.0\." && "Server" >!< lync_install["Product"])
{
if (hotfix_check_fversion(file:"Lync.exe", version:"16.0.4300.1001", channel:"MSI", channel_product:"Lync", path:lync_install["path"], bulletin:bulletin, kb:"3085634", product:"Skype for Business 2016") == HCF_OLDER)
vuln++;
if (hotfix_check_fversion(file:"Lync.exe", version:"16.0.6001.1038", channel:"Current", channel_product:"Lync", path:lync_install["path"], bulletin:bulletin, kb:"3085634", product:"Skype for Business 2016") == HCF_OLDER)
vuln++;
}
}
}
perform_lync_checks();
if(vuln)
{
set_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
hotfix_security_warning();
hotfix_check_fversion_end();
exit(0);
}
else
{
hotfix_check_fversion_end();
audit(AUDIT_HOST_NOT, 'affected');
}