TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs…
Priority LOW 39CWE-825Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 9 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.
Why it matters now
EPSS 0.04719 91st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 9 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Kaspersky | TigerVNC | 1.10.0 | — | No fix listed | CNA |
- TigerVNC VendorKaspersky Affected 1.10.0 Fixed in — No fix listed CNA
Remediation
Red Hat 2 advisories
- RHSA-2020:3875 Released 2020-09-29 · Red Hat rating Moderatetigervnc security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) tigervnc-1.8.0-21.el7, tigervnc-icons-1.8.0-21.el7, tigervnc-license-1.8.0-21.el7 +2
- Red Hat Enterprise Linux Client Optional (v. 7) tigervnc-server-applet-1.8.0-21.el7, tigervnc-server-module-1.8.0-21.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) tigervnc-1.8.0-21.el7, tigervnc-license-1.8.0-21.el7, tigervnc-server-minimal-1.8.0-21.el7
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) tigervnc-1.8.0-21.el7, tigervnc-icons-1.8.0-21.el7, tigervnc-server-1.8.0-21.el7 +2
- Red Hat Enterprise Linux Server (v. 7) tigervnc-1.8.0-21.el7, tigervnc-icons-1.8.0-21.el7, tigervnc-license-1.8.0-21.el7 +2
- Red Hat Enterprise Linux Server Optional (v. 7) tigervnc-server-applet-1.8.0-21.el7, tigervnc-server-module-1.8.0-21.el7
- Red Hat Enterprise Linux Workstation (v. 7) tigervnc-1.8.0-21.el7, tigervnc-icons-1.8.0-21.el7, tigervnc-license-1.8.0-21.el7 +2
- Red Hat Enterprise Linux Workstation Optional (v. 7) tigervnc-server-applet-1.8.0-21.el7, tigervnc-server-module-1.8.0-21.el7
- RHSA-2020:1497 Released 2020-04-16 · Red Hat rating Moderatetigervnc security update
- Red Hat Enterprise Linux AppStream (v. 8) tigervnc-1.9.0-14.el8_1, tigervnc-icons-1.9.0-14.el8_1, tigervnc-license-1.9.0-14.el8_1 +4
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Kaspersky TigerVNC — openSUSE-SU-2020:0087
5 records Highest priority Priority LOW 5 LOW
Other records, highest priority first
- TI-2019-11779 Stack-based buffer overflow in Kaspersky TigerVNCPriority LOW 39
- TI-2019-11778 Heap-based buffer overflow in Kaspersky TigerVNCPriority LOW 39
- TI-2019-11777 Heap-based buffer overflow in Kaspersky TigerVNCPriority LOW 39
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:1497 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2020:3875 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2020:3875 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2020:3875 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2020:3875 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:3875 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2020:3875 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:3875 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2020:3875 |
Timeline
- 2026-10-02 Threatist record created from CVE-2019-15691
- 2026-10-03 Alias added: GHSA-vmc8-ggh9-8p8j
References
More Kaspersky vulnerabilities
- TI-2012-01284 The ZIP file parser in AhnLab V3 Internet Security 2011.01.18.00, AVG Anti-Virus… CVSS 2.0MEDIUM 4.3
- TI-2012-01283 The Gzip file parser in AVG Anti-Virus 10.0.0.1190, Bitdefender 7.2, Command Antivirus… CVSS 2.0MEDIUM 4.3
- TI-2012-01281 The TAR file parser in AhnLab V3 Internet Security 2011.01.18.00, Avira AntiVir… CVSS 2.0MEDIUM 4.3
- TI-2012-01279 The TAR file parser in Avira AntiVir 7.11.1.163, Antiy Labs AVL SDK 2.0.3.7, avast!… CVSS 2.0MEDIUM 4.3
- TI-2012-01278 The TAR file parser in AVG Anti-Virus 10.0.0.1190, Quick Heal (aka Cat QuickHeal) 11.00… CVSS 2.0MEDIUM 4.3
- TI-2012-01275 The CAB file parser in Dr.Web 5.0.2.03300, Trend Micro HouseCall 9.120.0.1004, Kaspersky… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2019-15691 · CVE Program
- CVE-2019-15691 · NVD
- FIRST EPSS
- GHSA-vmc8-ggh9-8p8j · GitHub Advisory Database · CC BY 4.0
- CVE-2019-15691 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences