// For flags

CVE-2019-15691

tigervnc: Stack use-after-return due to incorrect usage of stack memory in ZRLEDecoder

Severity Score

7.2
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

TigerVNC versiones anteriores a 1.10.1, es vulnerable al uso de la pila previo al retorno, que se presenta debido a un uso incorrecto de la memoria de pila en ZRLEDecoder. Si la rutina de decodificación arroja una excepción, ZRLEDecoder puede intentar acceder a la variable de la pila, que ya ha sido liberada durante el proceso del desempaquetado de la pila. La explotación de esta vulnerabilidad podría resultar potencialmente en una ejecución de código remota. Este ataque parece ser explotable a través de la conectividad de red.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-08-27 CVE Reserved
  • 2019-12-26 CVE Published
  • 2023-03-07 EPSS Updated
  • 2024-08-05 CVE Updated
  • 2024-08-05 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-672: Operation on a Resource after Expiration or Release
  • CWE-825: Expired Pointer Dereference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Tigervnc
Search vendor "Tigervnc"
Tigervnc
Search vendor "Tigervnc" for product "Tigervnc"
< 1.10.1
Search vendor "Tigervnc" for product "Tigervnc" and version " < 1.10.1"
-
Affected
Opensuse
Search vendor "Opensuse"
Leap
Search vendor "Opensuse" for product "Leap"
15.1
Search vendor "Opensuse" for product "Leap" and version "15.1"
-
Affected