Signature Detail
Short Name |
VNC:AUTH-BYPASS |
|---|---|
Severity |
Critical |
Recommended |
No |
Recommended Action |
Drop |
Category |
VNC |
Keywords |
Authentication Bypass |
Release Date |
2006/05/30 |
Update Number |
1213 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
VNC: Authentication Bypass
This signature detects attempts to exploit a known vulnerability against RealVNC. Versions 4.1.1 and earlier are vulnerable. Attackers can avoid authenticating by exploiting this vulnerability in the authentication handshake.
Extended Description
RealVNC is susceptible to an authentication-bypass vulnerability. This issue is due to a flaw in the authentication process of the affected package. Exploiting this issue allows attackers to gain unauthenticated, remote access to the VNC servers. RealVNC 4.1.1 is vulnerable to this issue; other versions may also be affected. UPDATE (May 25, 2006): Reports indicate that this issue is being actively exploited in the wild.
Affected Products
- Cisco IP/VC 3540/DCS
- RealVNC RealVNC Enterprise Edition 4.0
- RealVNC RealVNC Enterprise Edition 4.1
- RealVNC RealVNC Enterprise Edition 4.2
- RealVNC RealVNC Enterprise Edition 4.2.2
- RealVNC RealVNC Free Edition 4.0
- RealVNC RealVNC Free Edition 4.1
- RealVNC RealVNC Free Edition 4.1.1
- RealVNC RealVNC Personal Edition 4.0
- RealVNC RealVNC Personal Edition 4.1
- RealVNC RealVNC Personal Edition 4.2
- RealVNC RealVNC Personal Edition 4.2.2
References