CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
79.7%
According to the versions of the git packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
Affected versions of Git have a vulnerability whereby Git can be tricked into sending private credentials to a host controlled by an attacker. This bug is similar to CVE-2020-5260(GHSA-qm7j-c969-7j4q). The fix for that bug still left the door open for an exploit where
some credential is leaked (but the attacker cannot control which one). Git uses external ‘credential helper’ programs to store and retrieve passwords or other credentials from secure storage provided by the operating system. Specially-crafted URLs that are considered illegal as of the recently published Git versions can cause Git to send a ‘blank’ pattern to helpers, missing hostname and protocol fields. Many helpers will interpret this as matching any URL, and will return some unspecified stored password, leaking the password to an attacker’s server. The vulnerability can be triggered by feeding a malicious URL to git clone
. However, the affected URLs look rather suspicious the likely vector would be through systems which automatically clone URLs not visible to the user, such as Git submodules, or package systems built around Git. The root of the problem is in Git itself, which should not be feeding blank input to helpers. However, the ability to exploit the vulnerability in practice depends on which helpers are in use. Credential helpers which are known to trigger the vulnerability: - Git’s ‘store’ helper - Git’s ‘cache’ helper - the ‘osxkeychain’ helper that ships in Git’s ‘contrib’ directory Credential helpers which are known to be safe even with vulnerable versions of Git: - Git Credential Manager for Windows Any helper not in this list should be assumed to trigger the vulnerability.(CVE-2020-11008)
Affected versions of Git have a vulnerability whereby Git can be tricked into sending private credentials to a host controlled by an attacker. Git uses external ‘credential helper’ programs to store and retrieve passwords or other credentials from secure storage provided by the operating system. Specially-crafted URLs that contain an encoded newline can inject unintended values into the credential helper protocol stream, causing the credential helper to retrieve the password for one server (e.g., good.example.com) for an HTTP request being made to another server (e.g., evil.example.com), resulting in credentials for the former being sent to the latter. There are no restrictions on the relationship between the two, meaning that an attacker can craft a URL that will present stored credentials for any host to a host of their choosing. The vulnerability can be triggered by feeding a malicious URL to git clone. However, the affected URLs look rather suspicious the likely vector would be through systems which automatically clone URLs not visible to the user, such as Git submodules, or package systems built around Git. The problem has been patched in the versions published on April 14th, 2020, going back to v2.17.x. Anyone wishing to backport the change further can do so by applying commit 9a6bbee (the full release includes extra checks for git fsck, but that commit is sufficient to protect clients against the vulnerability). The patched versions are:
2.17.4, 2.18.3, 2.19.4, 2.20.3, 2.21.2, 2.22.3, 2.23.2, 2.24.2, 2.25.3, 2.26.1.(CVE-2020-5260)
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(137016);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/08");
script_cve_id("CVE-2020-11008", "CVE-2020-5260");
script_name(english:"EulerOS 2.0 SP5 : git (EulerOS-SA-2020-1598)");
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 git packages installed, the EulerOS
installation on the remote host is affected by the following
vulnerabilities :
- Affected versions of Git have a vulnerability whereby
Git can be tricked into sending private credentials to
a host controlled by an attacker. This bug is similar
to CVE-2020-5260(GHSA-qm7j-c969-7j4q). The fix for that
bug still left the door open for an exploit where
_some_ credential is leaked (but the attacker cannot
control which one). Git uses external 'credential
helper' programs to store and retrieve passwords or
other credentials from secure storage provided by the
operating system. Specially-crafted URLs that are
considered illegal as of the recently published Git
versions can cause Git to send a 'blank' pattern to
helpers, missing hostname and protocol fields. Many
helpers will interpret this as matching _any_ URL, and
will return some unspecified stored password, leaking
the password to an attacker's server. The vulnerability
can be triggered by feeding a malicious URL to `git
clone`. However, the affected URLs look rather
suspicious the likely vector would be through systems
which automatically clone URLs not visible to the user,
such as Git submodules, or package systems built around
Git. The root of the problem is in Git itself, which
should not be feeding blank input to helpers. However,
the ability to exploit the vulnerability in practice
depends on which helpers are in use. Credential helpers
which are known to trigger the vulnerability: - Git's
'store' helper - Git's 'cache' helper - the
'osxkeychain' helper that ships in Git's 'contrib'
directory Credential helpers which are known to be safe
even with vulnerable versions of Git: - Git Credential
Manager for Windows Any helper not in this list should
be assumed to trigger the
vulnerability.(CVE-2020-11008)
- Affected versions of Git have a vulnerability whereby
Git can be tricked into sending private credentials to
a host controlled by an attacker. Git uses external
'credential helper' programs to store and retrieve
passwords or other credentials from secure storage
provided by the operating system. Specially-crafted
URLs that contain an encoded newline can inject
unintended values into the credential helper protocol
stream, causing the credential helper to retrieve the
password for one server (e.g., good.example.com) for an
HTTP request being made to another server (e.g.,
evil.example.com), resulting in credentials for the
former being sent to the latter. There are no
restrictions on the relationship between the two,
meaning that an attacker can craft a URL that will
present stored credentials for any host to a host of
their choosing. The vulnerability can be triggered by
feeding a malicious URL to git clone. However, the
affected URLs look rather suspicious the likely vector
would be through systems which automatically clone URLs
not visible to the user, such as Git submodules, or
package systems built around Git. The problem has been
patched in the versions published on April 14th, 2020,
going back to v2.17.x. Anyone wishing to backport the
change further can do so by applying commit 9a6bbee
(the full release includes extra checks for git fsck,
but that commit is sufficient to protect clients
against the vulnerability). The patched versions are:
2.17.4, 2.18.3, 2.19.4, 2.20.3, 2.21.2, 2.22.3, 2.23.2,
2.24.2, 2.25.3, 2.26.1.(CVE-2020-5260)
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-2020-1598
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?449923ea");
script_set_attribute(attribute:"solution", value:
"Update the affected git packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:POC/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:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-5260");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"patch_publication_date", value:"2020/06/02");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/02");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:git");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:git-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:git-core-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perl-Git");
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) 2020-2024 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 = ["git-2.23.0-1.h6.eulerosv2r7",
"git-core-2.23.0-1.h6.eulerosv2r7",
"git-core-doc-2.23.0-1.h6.eulerosv2r7",
"perl-Git-2.23.0-1.h6.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_WARNING,
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, "git");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
79.7%