PT-2018-3005 · Libssh2+5 · Libssh2+5

Chris Coulson · Published 2018-12-03 · Updated 2024-06-15 · CVE-2019-3855

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions libssh2 versions prior to 1.8.1

Description The issue is related to an integer overflow in the libssh2 library, which can be exploited by a remote attacker to execute arbitrary code on the client system when a user connects to a compromised SSH server. The vulnerability is associated with the libssh2 transport read function in the src/transport.c file and occurs when reading packets from the server.

Recommendations For libssh2 versions prior to 1.8.1, update to version 1.8.1 or later to resolve the issue. As a temporary workaround, consider restricting access to SSH servers until the update is applied. Avoid using the libssh2 transport read function until the issue is resolved.

Exploit

Fix

Integer Overflow

Memory Corruption

Weakness Enumeration

CWE-190

CWE-787

Related Identifiers

ALT-PU-2019-1501

BDU:2019-03331

BDU:2019-03898

CESA-2019_0679

CESA-2019_1175

CESA-2019_1652

CVE-2019-3855

DLA-1730-1

DLA-1730-3

DSA-4431-1

MGASA-2019-0139

OPENSUSE-SU-2019:1109-1

OPENSUSE-SU-2019_1075-1

OPENSUSE-SU-2019_1109-1

OPENSUSE-SU-2020:2126-1

OPENSUSE-SU-2020:2129-1

OPENSUSE-SU-2020_2126-1

OPENSUSE-SU-2020_2129-1

OPENSUSE-SU-2024:10999-1

RHSA-2019:0679

RHSA-2019:1175

RHSA-2019:1652

RHSA-2019:1791

RHSA-2019:1943

RHSA-2019:2399

RHSA-2019_0679

RHSA-2019_1175

RHSA-2019_1652

SUSE-SU-2019:0655-1

SUSE-SU-2019:13982-1

SUSE-SU-2019:13997-1

SUSE-SU-2019_0655-1

SUSE-SU-2019_13982-1

SUSE-SU-2020:3551-1

USN-5308-1

Affected Products

Alt Linux

Centos

Red Hat

Suse

Ubuntu

Libssh2

References · 187

• 🔥❌ https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498 · Exploit, Deleted
• https://bdu.fstec.ru/vul/2022-05961 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3861 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3860 · Security Note
• https://bdu.fstec.ru/vul/2019-01304 · Security Note
• https://ubuntu.com/security/CVE-2019-3862 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-03898 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20815 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2019:1109-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:13997-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2019-3855 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:3551-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-3857 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2019-1175.html · Vendor Advisory