9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.3 High
AI Score
Confidence
High
0.046 Low
EPSS
Percentile
92.6%
The remote host is missing an update for the Debian
# SPDX-FileCopyrightText: 2019 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.891730");
script_cve_id("CVE-2019-13115", "CVE-2019-3855", "CVE-2019-3856", "CVE-2019-3857", "CVE-2019-3858", "CVE-2019-3859", "CVE-2019-3860", "CVE-2019-3861", "CVE-2019-3862", "CVE-2019-3863");
script_tag(name:"creation_date", value:"2019-03-25 22:00:00 +0000 (Mon, 25 Mar 2019)");
script_version("2024-02-02T05:06:07+0000");
script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +0000 (Fri, 02 Feb 2024)");
script_tag(name:"cvss_base", value:"9.3");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2019-03-26 14:10:46 +0000 (Tue, 26 Mar 2019)");
script_name("Debian: Security Advisory (DLA-1730-1)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2019 Greenbone AG");
script_family("Debian Local Security Checks");
script_dependencies("gather-package-list.nasl");
script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB8");
script_xref(name:"Advisory-ID", value:"DLA-1730-1");
script_xref(name:"URL", value:"https://www.debian.org/lts/security/2019/DLA-1730-1");
script_xref(name:"URL", value:"https://wiki.debian.org/LTS");
script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'libssh2' package(s) announced via the DLA-1730-1 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"Several vulnerabilities have recently been discovered in libssh2, a client-side C library implementing the SSH2 protocol
CVE-2019-3855
An integer overflow flaw which could have lead to an out of bounds write was discovered in libssh2 in the way packets were read from the server. A remote attacker who compromised an SSH server could have been able to execute code on the client system when a user connected to the server.
CVE-2019-3856
An integer overflow flaw, which could have lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests were parsed. A remote attacker who compromised an SSH server could have been able to execute code on the client system when a user connected to the server.
CVE-2019-3857
An integer overflow flaw which could have lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal were parsed. A remote attacker who compromises an SSH server could have been able to execute code on the client system when a user connected to the server.
CVE-2019-3858
An out of bounds read flaw was discovered in libssh2 when a specially crafted SFTP packet was received from the server. A remote attacker who compromised an SSH server could have been able to cause a Denial of Service or read data in the client memory.
CVE-2019-3859
An out of bounds read flaw was discovered in libssh2's _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromised an SSH server could have be able to cause a Denial of Service or read data in the client memory.
CVE-2019-3860
An out of bounds read flaw was discovered in libssh2 in the way SFTP packets with empty payloads were parsed. A remote attacker who compromised an SSH server could have be able to cause a Denial of Service or read data in the client memory.
CVE-2019-3861
An out of bounds read flaw was discovered in libssh2 in the way SSH packets with a padding length value greater than the packet length were parsed. A remote attacker who compromised a SSH server could have been able to cause a Denial of Service or read data in the client memory.
CVE-2019-3862
An out of bounds read flaw was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload were parsed. A remote attacker who compromised an SSH server could have been able to cause a Denial of Service or read data in the client memory.
CVE-2019-3863
A server could have sent multiple keyboard interactive response messages whose total length were greater than unsigned char max characters. This value was used as an index to copy memory causing an out of bounds memory write error.
For Debian 8 Jessie, these problems have been fixed in version 1.4.3-4.1+deb8u2.
We recommend that you upgrade your libssh2 packages.
Further information about Debian LTS security advisories, how to apply these ... [Please see the references for more information on the vulnerabilities]");
script_tag(name:"affected", value:"'libssh2' package(s) on Debian 8.");
script_tag(name:"solution", value:"Please install the updated package(s).");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"package");
exit(0);
}
include("revisions-lib.inc");
include("pkg-lib-deb.inc");
release = dpkg_get_ssh_release();
if(!release)
exit(0);
res = "";
report = "";
if(release == "DEB8") {
if(!isnull(res = isdpkgvuln(pkg:"libssh2-1", ver:"1.4.3-4.1+deb8u2", rls:"DEB8"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libssh2-1-dbg", ver:"1.4.3-4.1+deb8u2", rls:"DEB8"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libssh2-1-dev", ver:"1.4.3-4.1+deb8u2", rls:"DEB8"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.3 High
AI Score
Confidence
High
0.046 Low
EPSS
Percentile
92.6%