CVE-2006-2450
auth.c in LibVNCServer 0.7.1 allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, a different issue…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
auth.c in LibVNCServer 0.7.1 allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, a different issue than CVE-2006-2369.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 4.36% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- libvncserver/libvncserver
- Source
- secalert@redhat.com
EPSS 4.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=376824Patch
- http://libvncserver.cvs.sourceforge.net/libvncserver/libvncserver/libvncserver/auth.c?r1=1.11&r2=1.14&diff_format=uPatch
- http://seclists.org/fulldisclosure/2022/May/29
- http://secunia.com/advisories/20940Patch, Vendor Advisory
- http://secunia.com/advisories/21179
- http://secunia.com/advisories/21349
- http://secunia.com/advisories/21393
- http://secunia.com/advisories/21405
- http://secunia.com/advisories/24525
- http://security.gentoo.org/glsa/glsa-200608-05.xml
- http://security.gentoo.org/glsa/glsa-200608-12.xml
- http://security.gentoo.org/glsa/glsa-200703-19.xml
- http://sourceforge.net/project/shownotes.php?release_id=431724&group_id=32584Patch
- http://www.novell.com/linux/security/advisories/2006_42_kernel.html
- http://www.securityfocus.com/archive/1/442986/100/0/threaded
- http://www.securityfocus.com/bid/18977
- http://www.vupen.com/english/advisories/2006/2797
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=376824Patch
- http://libvncserver.cvs.sourceforge.net/libvncserver/libvncserver/libvncserver/auth.c?r1=1.11&r2=1.14&diff_format=uPatch
- http://seclists.org/fulldisclosure/2022/May/29
- http://secunia.com/advisories/20940Patch, Vendor Advisory
- http://secunia.com/advisories/21179
- http://secunia.com/advisories/21349
- http://secunia.com/advisories/21393
- http://secunia.com/advisories/21405
- http://secunia.com/advisories/24525
- http://security.gentoo.org/glsa/glsa-200608-05.xml
- http://security.gentoo.org/glsa/glsa-200608-12.xml
- http://security.gentoo.org/glsa/glsa-200703-19.xml
- http://sourceforge.net/project/shownotes.php?release_id=431724&group_id=32584Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.