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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2019-3855

CVE-2019-3855

HIGH8.8

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1

Published Mar 21, 2019

Modified 2 months ago

Details

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

References(28)

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html

http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html

http://seclists.org/fulldisclosure/2019/Sep/42

http://www.openwall.com/lists/oss-security/2019/03/18/3

http://www.securityfocus.com/bid/107485

https://access.redhat.com/errata/RHSA-2019:0679

https://access.redhat.com/errata/RHSA-2019:1175

https://access.redhat.com/errata/RHSA-2019:1652

https://access.redhat.com/errata/RHSA-2019:1791

https://access.redhat.com/errata/RHSA-2019:1943

https://access.redhat.com/errata/RHSA-2019:2399

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3855

https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/

https://seclists.org/bugtraq/2019/Apr/25

https://seclists.org/bugtraq/2019/Mar/25

https://seclists.org/bugtraq/2019/Sep/49

https://security.netapp.com/advisory/ntap-20190327-0005/

https://support.apple.com/kb/HT210609

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767

https://www.cve.org/CVERecord?id=CVE-2019-3855

CVSS Analysis

CVSS v3.1

8.8

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

8.8/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

Memory Safety

Out-of-bounds Write

Other

Ecosystems

Timeline

PublishedMar 21, 2019

ModifiedDec 17, 2025

CVE-2019-3855 | Mondoo Vulnerability Intelligence