The PPTP VPN service in Watchguard Firebox before 10, when performing the MS-CHAPv2 authentication handshake, generates different error codes depending on whether the username is valid or invalid, which allows remote attackers to enumerate valid usernames.

Unspecified vulnerability in the Supervisor Engine 32 (Sup32), Supervisor Engine 720 (Sup720), and Route Switch Processor 720 (RSP720) for multiple Cisco products, when using Multi Protocol Label Switching (MPLS) VPN and OSPF sham-link, allows remote attackers to cause a denial of service (blocked queue, device restart, or memory leak) via unknown vectors.

Check Point VPN-1 Power/UTM, with NGX R60 through R65 and NG AI R55 software, allows remote authenticated users to cause a denial of service (site-to-site VPN tunnel outage), and possibly intercept network traffic, by configuring the local RFC1918 IP address to be the same as one of this tunnel's endpoint RFC1918 IP addresses, and then using SecuRemote to connect to a network interface at the other endpoint.

The web interface on the Linksys WRT54g router with firmware 1.00.9 does not require credentials when invoking scripts, which allows remote attackers to perform arbitrary administrative actions via a direct request to (1) Advanced.tri, (2) AdvRoute.tri, (3) Basic.tri, (4) ctlog.tri, (5) ddns.tri, (6) dmz.tri, (7) factdefa.tri, (8) filter.tri, (9) fw.tri, (10) manage.tri, (11) ping.tri, (12) PortRange.tri, (13) ptrigger.tri, (14) qos.tri, (15) rstatus.tri, (16) tracert.tri, (17) vpn.tri, (18) WanMac.tri, (19) WBasic.tri, or (20) WFilter.tri. NOTE: the Security.tri vector is already covered by CVE-2006-5202.

Cross-site scripting (XSS) vulnerability in the login page in Check Point VPN-1 UTM Edge W Embedded NGX 7.0.48x allows remote attackers to inject arbitrary web script or HTML via the user parameter.

Multiple cross-site scripting (XSS) vulnerabilities in F5 FirePass 4100 SSL VPN 5.4.1 through 5.5.2 and 6.0 through 6.0.1, when pre-logon sequences are enabled, allow remote attackers to inject arbitrary web script or HTML via the query string to (1) my.activation.php3 and (2) my.logon.php3.

Multiple cross-site scripting (XSS) vulnerabilities in the Mediation server in IPdiva SSL VPN Server 2.2 before 2.2.8.84 and 2.3 before 2.3.2.14 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors.

The Mediation server in IPdiva SSL VPN Server 2.2 before 2.2.8.84 and 2.3 before 2.3.2.14 stores the number of remaining allowed login attempts in a cookie, which makes it easier for remote attackers to conduct brute force attacks by manipulating this cookie's value.

The Auto Local Logon feature in Check Point VPN-1 SecuRemote/SecureClient NGX R60 and R56 for Windows caches credentials under the Checkpoint\SecuRemote registry key, which has Everyone/Full Control permissions, which allows local users to gain privileges by reading and reusing the credentials.

Cross-site scripting (XSS) vulnerability in vpnum/userslist.php in Endian Firewall 2.1.2 allows remote attackers to inject arbitrary web script or HTML via the psearch parameter. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Unspecified vulnerability in Funkwerk System Software before 7.4.1 PATCH 9 for certain Funkwerk Router / VPN devices allows remote attackers to cause a denial of service (panic and reboot) via unspecified DNS requests.

Cisco Systems VPN Client IPSec Driver (CVPNDRVA.sys) 5.0.02.0090 allows local users to cause a denial of service (crash) by calling the 0x80002038 IOCTL with a small size value, which triggers memory corruption.

Unspecified vulnerability in the LDAP authentication feature in Aruba Mobility Controller 2.3.6.15, 2.5.2.11, 2.5.4.25, 2.5.5.7, 3.1.1.3, and 2.4.8.11-FIPS or earlier allows remote attackers to bypass authentication mechanisms and obtain management or VPN interface access.

Multiple format string vulnerabilities in the configuration file in SonicWALL GLobal VPN Client 3.1.556 and 4.0.0.810 allow user-assisted remote attackers to execute arbitrary code via format string specifiers in the (1) Hostname tag or the (2) name attribute in the Connection tag. NOTE: there might not be any realistic circumstances in which this issue crosses privilege boundaries.

The IPsec module in the VPN component in Ingate Firewall before 4.6.0 and SIParator before 4.6.0 allows remote attackers to cause a denial of service (module crash) via an IPsec Phase 2 proposal that lacks Perfect Forward Secrecy (PFS).

Cross-site scripting (XSS) vulnerability in download_plugin.php3 in F5 Firepass 4100 SSL VPN 5.4 through 5.5.2 and 6.0 through 6.0.1 allows remote attackers to inject arbitrary web script or HTML via the backurl parameter.

Cross-site scripting (XSS) vulnerability in cgi-bin/welcome (aka the login page) in Netgear SSL312 PROSAFE SSL VPN-Concentrator 25 allows remote attackers to inject arbitrary web script or HTML via the err parameter in the context of an error page.

Cisco VPN Client on Windows before 4.8.02.0010 allows local users to gain privileges by enabling the "Start Before Logon" (SBL) and Microsoft Dial-Up Networking options, and then interacting with the dial-up networking dialog box.

Cisco VPN Client on Windows before 5.0.01.0600, and the 5.0.01.0600 InstallShield (IS) release, uses weak permissions for cvpnd.exe (Modify granted to Interactive Users), which allows local users to gain privileges via a modified cvpnd.exe.

The login interface in Symantec Enterprise Firewall 6.x, when a VPN with pre-shared key (PSK) authentication is enabled, generates different responses depending on whether or not a username is valid, which allows remote attackers to enumerate valid usernames.