tigervnc: Server crash via long usernames
Published Apr 1, 2017
7.5
HIGHCVSS 3.0
EPSS 1.61%
Description
In TigerVNC 1.7.1 (SSecurityPlain.cxx SSecurityPlain::processMsg), unauthenticated users can crash the server by sending long usernames.
Affected products
No data.
No data.
Red Hat Enterprise Linux 7
fltk-0:1.3.4-1.el7
Fixed · RHSA-2017:2000
Red Hat Enterprise Linux 7
tigervnc-0:1.8.0-1.el7
Fixed · RHSA-2017:2000
Red Hat Enterprise Linux 6
tigervnc
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | fltk-0:1.3.4-1.el7 | Fixed | RHSA-2017:2000 |
| Red Hat Enterprise Linux 7 | tigervnc-0:1.8.0-1.el7 | Fixed | RHSA-2017:2000 |
| Red Hat Enterprise Linux 6 | tigervnc | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.61% (0.01612) | 75.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.61% (0.01612) | 72.73th | v5 (v2026.06.15) |
| Apr 23, 2026 | 1.19% (0.01193) | 78.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.81% (0.02813) | 84.88th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.54% (0.05540) | 83.37th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.81% (0.02813) | 85.20th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.28% (0.00278) | 68.61th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.28% (0.00278) | 67.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.28% (0.00278) | 63.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (8)
- http://www.securityfocus.com/bid/97305 vdb-entryx_refsource_BID
- https://access.redhat.com/errata/RHSA-2017:2000 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-7394 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1438700 Issue Tracking
- https://github.com/TigerVNC/tigervnc/pull/440 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-7394
- https://security.gentoo.org/glsa/201801-13 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2017-7394
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/97305 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/errata/RHSA-2017:2000 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2017-7394 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1438700 | Issue Tracking | |
| https://github.com/TigerVNC/tigervnc/pull/440 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-7394 | ||
| https://security.gentoo.org/glsa/201801-13 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2017-7394 |
Change history (0)
No recorded changes yet.