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libssh2: Zero-byte allocation with a specially crafted SFTP packed leading to an out-of-bounds read

🗓️ 06 Aug 2019 12:33:10Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

Libssh2 zero-byte allocation from a crafted SFTP packet causes out-of-bounds read and denial of service.

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Refs
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IBM Security Bulletins		Security Bulletin: Security vulnerabilities have been identified in BigFix Platform shipped with IBM License Metric Tool.
28 Nov 201908:40
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IBM Security Bulletins		Security Bulletin: IBM Integrated Management Module II (IMM2) is affected by multiple vulnerabilities in libssh2
4 Jun 202015:26
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IBM Security Bulletins		Security Bulletin: IBM ToolsCenter Dynamic System Analysis (DSA) Preboot is affected by multiple vulnerabilities.
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IBM Security Bulletins		Security Bulletin: Multiple security vulnerabilities were fixed in IBM Security Access Manager Appliance (CVE-2019-3861, CVE-019-3858)
28 Jan 202015:09
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IBM Security Bulletins		Security Bulletin: Vyatta 5600 vRouter Software Patches - Release 1801-z
15 Jul 201922:35
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FreeBSD		libssh2 -- multiple issues
14 Mar 201900:00
–freebsd
Tenable Nessus		Amazon Linux 2 : libssh2 (ALAS-2019-1263)
12 Aug 201900:00
–nessus
Tenable Nessus		CentOS 7 : libssh2 (CESA-2019:2136)
30 Aug 201900:00
–nessus
Tenable Nessus		Debian DSA-4431-1 : libssh2 - security update
15 Apr 201900:00
–nessus
Tenable Nessus		EulerOS 2.0 SP2 : libssh2 (EulerOS-SA-2019-1308)
1 May 201900:00
–nessus
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7ppclibssh20:1.8.0-3.el7libssh2-0:1.8.0-3.el7.ppc.rpm
Red Hat Enterprise Linux7ppc64libssh20:1.8.0-3.el7libssh2-0:1.8.0-3.el7.ppc64.rpm
Red Hat Enterprise Linux7ppc64lelibssh20:1.8.0-3.el7libssh2-0:1.8.0-3.el7.ppc64le.rpm
Red Hat Enterprise Linux7s390libssh20:1.8.0-3.el7libssh2-0:1.8.0-3.el7.s390.rpm
Red Hat Enterprise Linux7s390xlibssh20:1.8.0-3.el7libssh2-0:1.8.0-3.el7.s390x.rpm
Red Hat Enterprise Linux7x86_64libssh20:1.8.0-3.el7libssh2-0:1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux7anylibssh20:1.8.0-3.el7.i686libssh2-0:1.8.0-3.el7.i686.noarch.rpm
Red Hat Enterprise Linux7ppclibssh2-debuginfo0:1.8.0-3.el7libssh2-debuginfo-0:1.8.0-3.el7.ppc.rpm
Red Hat Enterprise Linux7ppc64libssh2-debuginfo0:1.8.0-3.el7libssh2-debuginfo-0:1.8.0-3.el7.ppc64.rpm
Red Hat Enterprise Linux7ppc64lelibssh2-debuginfo0:1.8.0-3.el7libssh2-debuginfo-0:1.8.0-3.el7.ppc64le.rpm
Rows per page

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28 Jun 2026 12:32Current
7.3High risk
Vulners AI Score7.3
CVSS 26.4
CVSS 35 - 9.1
EPSS0.06448
CWE-125
libssh2zero-byte allocationcrafted sftp packetout-of-bounds readdenial of serviceremote attackerserver compromiseclient memory
5