CVE-2019-15695

tigervnc: Stack buffer overflow in CMsgReader::readSetCursor

Severity Score

7.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

TigerVNC version prior to 1.10.1 is vulnerable to stack buffer overflow, which could be triggered from CMsgReader::readSetCursor. This vulnerability occurs due to insufficient sanitization of PixelFormat. Since remote attacker can choose offset from start of the buffer to start writing his values, exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

TigerVNC versión anterior a 1.10.1, es vulnerable al desbordamiento de búfer de pila, que podría ser activada desde la función CMsgReader::readSetCursor. Esta vulnerabilidad se presenta debido al saneamiento insuficiente de PixelFormat. Dado que el atacante remoto puede elegir el desplazamiento desde el arranque del búfer para comenzar a escribir sus valores, 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

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-121: Stack-based Buffer Overflow
CWE-754: Improper Check for Unusual or Exceptional Conditions
CWE-787: Out-of-bounds Write

CAPEC

References (6)

URL	Tag	Source

URL	Date	SRC
https://www.openwall.com/lists/oss-security/2019/12/20/2	2024-08-05

URL	Date	SRC
https://github.com/CendioOssman/tigervnc/commit/05e28490873a861379c943bf616614b78b558b89	2020-10-16
https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1	2020-10-16

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.html	2020-10-16
https://access.redhat.com/security/cve/CVE-2019-15695	2020-09-29
https://bugzilla.redhat.com/show_bug.cgi?id=1790318	2020-09-29

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