CVE-2019-3863

libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes

Severity Score

8.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.

Se ha descubierto un problema en versiones anteriores a la 1.8.1 de libssh2. Un servidor podría enviar múltiples mensajes de respuesta interactiva mediante teclado cuya longitud total es mayor que el los caracteres no firmados char max. El valor se utiliza como índice para copiar memoria causando un error de escritura de memoria fuera de límites.

A flaw was found in libssh2. A server could send a multiple keyboard interactive response messages, whose total length are greater than the unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error. The highest threat from this vulnerability is to data confidentiality and integrity and system availability.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-01-03 CVE Reserved
2019-03-19 CVE Published
2024-08-04 CVE Updated
2024-10-18 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-190: Integer Overflow or Wraparound
CWE-787: Out-of-bounds Write

CAPEC

References (18)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html	Mailing List
https://seclists.org/bugtraq/2019/Apr/25	Mailing List
https://security.netapp.com/advisory/ntap-20190327-0005	Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html	X_refsource_misc

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3863	2023-11-07
https://www.libssh2.org/CVE-2019-3863.html	2023-11-07

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html	2023-11-07
https://access.redhat.com/errata/RHSA-2019:0679	2023-11-07
https://access.redhat.com/errata/RHSA-2019:1175	2023-11-07
https://access.redhat.com/errata/RHSA-2019:1652	2023-11-07
https://access.redhat.com/errata/RHSA-2019:1791	2023-11-07
https://access.redhat.com/errata/RHSA-2019:1943	2023-11-07
https://access.redhat.com/errata/RHSA-2019:2399	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O	2023-11-07
https://www.debian.org/security/2019/dsa-4431	2023-11-07
https://access.redhat.com/security/cve/CVE-2019-3863	2019-08-07
https://bugzilla.redhat.com/show_bug.cgi?id=1687313	2019-08-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libssh2 Search vendor "Libssh2"		Libssh2 Search vendor "Libssh2" for product "Libssh2"				< 1.8.1 Search vendor "Libssh2" for product "Libssh2" and version " < 1.8.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Netapp Search vendor "Netapp"		Ontap Select Deploy Administration Utility Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility"				-		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.0 Search vendor "Opensuse" for product "Leap" and version "15.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.3 Search vendor "Opensuse" for product "Leap" and version "42.3"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		Affected