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
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
EPSS
Percentile
91.1%
According to the versions of the libssh2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
An out of bounds read flaw was discovered in libssh2 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3858)
An out of bounds read flaw was discovered in libssh2 in the _libssh2_packet_require and
_libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be 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 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may 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 SSH packets with a padding length value greater than the packet length are parsed. A remote attacker who compromises a SSH server may 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_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a denial of service or read data in the client memory.(CVE-2019-3862)
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 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.(CVE-2019-3855)
An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 in the way keyboard prompt requests are parsed. 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.(CVE-2019-3856)
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. 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.(CVE-2019-3857)
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.(CVE-2019-3863)
Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(124437);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/20");
script_cve_id(
"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_name(english:"EulerOS 2.0 SP5 : libssh2 (EulerOS-SA-2019-1310)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the libssh2 package installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :
- An out of bounds read flaw was discovered in libssh2
when a specially crafted SFTP packet is received from
the server. A remote attacker who compromises a SSH
server may be able to cause a denial of service or read
data in the client memory.(CVE-2019-3858)
- An out of bounds read flaw was discovered in libssh2 in
the _libssh2_packet_require and
_libssh2_packet_requirev functions. A remote attacker
who compromises a SSH server may be 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 in
the way SFTP packets with empty payloads are parsed. A
remote attacker who compromises a SSH server may 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 SSH packets with a padding length value greater
than the packet length are parsed. A remote attacker
who compromises a SSH server may 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_MSG_CHANNEL_REQUEST packets with an exit
status message and no payload are parsed. A remote
attacker who compromises a SSH server may be able to
cause a denial of service or read data in the client
memory.(CVE-2019-3862)
- An integer overflow flaw which could lead to an out of
bounds write was discovered in libssh2 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.(CVE-2019-3855)
- An integer overflow flaw, which could lead to an out of
bounds write, was discovered in libssh2 in the way
keyboard prompt requests are parsed. 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.(CVE-2019-3856)
- An integer overflow flaw which could lead to an out of
bounds write was discovered in libssh2 in the way
SSH_MSG_CHANNEL_REQUEST packets with an exit signal are
parsed. 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.(CVE-2019-3857)
- 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.(CVE-2019-3863)
Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
# https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-1310
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c6c5cdd9");
script_set_attribute(attribute:"solution", value:
"Update the affected libssh2 packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3855");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2019-3862");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"patch_publication_date", value:"2019/04/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/01");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libssh2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
script_exclude_keys("Host/EulerOS/uvp_version");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "EulerOS UVP " + uvp);
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
flag = 0;
pkgs = ["libssh2-1.4.3-10.1.h3.eulerosv2r7"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"5", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libssh2");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3855
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3856
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3857
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3858
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3859
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3860
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3861
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3862
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3863
www.nessus.org/u?c6c5cdd9
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
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
EPSS
Percentile
91.1%