VulnerabilityModified
CVE-2002-1336
TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.
HIGH 7.5EPSS 2.40%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 2.40% probability · 83th percentile
- CISA KEV
- Not listed
- Affected
- tightvnc/tightvnc
- Source
- cve@mitre.org
References
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640
- http://marc.info/?l=bugtraq&m=102753170201524&w=2
- http://marc.info/?l=bugtraq&m=102769183913594&w=2
- http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022
- http://www.redhat.com/support/errata/RHSA-2002-287.html
- http://www.redhat.com/support/errata/RHSA-2003-041.html
- http://www.securityfocus.com/bid/5296
- http://www.tightvnc.com/WhatsNew.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5992
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640
- http://marc.info/?l=bugtraq&m=102753170201524&w=2
- http://marc.info/?l=bugtraq&m=102769183913594&w=2
- http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022
- http://www.redhat.com/support/errata/RHSA-2002-287.html
- http://www.redhat.com/support/errata/RHSA-2003-041.html
- http://www.securityfocus.com/bid/5296
- http://www.tightvnc.com/WhatsNew.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5992
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.