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CVE-2002-1511

15
FAUCET Score

CVE-2002-1511 describes a vulnerability in the vncserver wrapper for various VNC implementations, including TightVNC and AT&T VNC, where the rand() function is used instead of srand() to generate weak cookies. This flaw allows an unauthenticated attacker to potentially gain unauthorized access to VNC sessions due to predictable cookie generation. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:P/I:N/A:N), it is a medium-severity issue with low attack complexity and a potential impact of information disclosure. There is no evidence of active exploitation, publicly available exploit code in Metasploit, Nuclei, or ExploitDB, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.3.3CPE matchmatch criteria
cpe:2.3:a:att:vnc:3.3.3:*:*:*:*:*:*:*
3.3.3r2CPE matchmatch criteria
cpe:2.3:a:att:vnc:3.3.3r2:*:*:*:*:*:*:*
3.3.4CPE matchmatch criteria
cpe:2.3:a:att:vnc:3.3.4:*:*:*:*:*:*:*
3.3.5CPE matchmatch criteria
cpe:2.3:a:att:vnc:3.3.5:*:*:*:*:*:*:*
3.3.6CPE matchmatch criteria
cpe:2.3:a:att:vnc:3.3.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.81%
Probability of exploitation in next 30 days
EPSS Percentile
76.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0181 is in the 63rd percentile among its peer group of 23,701 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux AS (Advanced Server) version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 7.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux 8.0
View patch

Vendor Advisories (1)

redhatCVE-2002-1511Moderate

security flaw

Oct 11, 2002

References

changelogs.credativ.org / debian/pool/main/v/vnc/vnc_3.3.6-3/changelog
distro.conectiva.com.br / atualizacoes
security.gentoo.org / glsa/glsa-200302-15.xml
sunsolve.sun.com / pub-cgi/retrieve.pl
iss.net / security_center/static/11384.php
Vendor Advisory
mandrakesoft.com / security/advisories
redhat.com / support/errata/RHSA-2003-041.html
PatchVendor Advisory
redhat.com / support/errata/RHSA-2003-068.html
securityfocus.com / bid/6905