CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
77.3%
According to the versions of the git packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :
Git is a revision control system. Prior to versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1, by feeding specially crafted input to git apply --reject
, a path outside the working tree can be overwritten with partially controlled contents (corresponding to the rejected hunk(s) from the given patch). A fix is available in versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1. As a workaround, avoid using git apply
with --reject
when applying patches from an untrusted source. Use git apply --stat
to inspect a patch before applying; avoid applying one that create a conflict where a link corresponding to the *.rej
file exists. (CVE-2023-25652)
In Git for Windows, the Windows port of Git, no localized messages are shipped with the installer. As a consequence, Git is expected not to localize messages at all, and skips the gettext initialization.
However, due to a change in MINGW-packages, the gettext()
function’s implicit initialization no longer uses the runtime prefix but uses the hard-coded path C:\mingw64\share\locale
to look for localized messages. And since any authenticated user has the permission to create folders in C:\
(and since C:\mingw64
does not typically exist), it is possible for low-privilege users to place fake messages in that location where git.exe
will pick them up in version 2.40.1. This vulnerability is relatively hard to exploit and requires social engineering. For example, a legitimate message at the end of a clone could be maliciously modified to ask the user to direct their web browser to a malicious website, and the user might think that the message comes from Git and is legitimate. It does require local write access by the attacker, though, which makes this attack vector less likely. Version 2.40.1 contains a patch for this issue. Some workarounds are available. Do not work on a Windows machine with shared accounts, or alternatively create a C:\mingw64
folder and leave it empty. Users who have administrative rights may remove the permission to create folders in C:\
. (CVE-2023-25815)
Git is a revision control system. Prior to versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1, a specially crafted .gitmodules
file with submodule URLs that are longer than 1024 characters can used to exploit a bug in config.c::git_config_copy_or_rename_section_in_file()
. This bug can be used to inject arbitrary configuration into a user’s $GIT_DIR/config
when attempting to remove the configuration section associated with that submodule. When the attacker injects configuration values which specify executables to run (such as core.pager
, core.editor
, core.sshCommand
, etc.) this can lead to a remote code execution. A fix A fix is available in versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1. As a workaround, avoid running git submodule deinit
on untrusted repositories or without prior inspection of any submodule sections in $GIT_DIR/config
. (CVE-2023-29007)
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 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(188920);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/16");
script_cve_id("CVE-2023-25652", "CVE-2023-25815", "CVE-2023-29007");
script_name(english:"EulerOS Virtualization 3.0.6.0 : git (EulerOS-SA-2023-3431)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the git packages installed, the EulerOS Virtualization installation on the remote host is
affected by the following vulnerabilities :
- Git is a revision control system. Prior to versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8,
2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1, by feeding specially crafted input to `git apply --reject`, a
path outside the working tree can be overwritten with partially controlled contents (corresponding to the
rejected hunk(s) from the given patch). A fix is available in versions 2.30.9, 2.31.8, 2.32.7, 2.33.8,
2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1. As a workaround, avoid using `git apply` with
`--reject` when applying patches from an untrusted source. Use `git apply --stat` to inspect a patch
before applying; avoid applying one that create a conflict where a link corresponding to the `*.rej` file
exists. (CVE-2023-25652)
- In Git for Windows, the Windows port of Git, no localized messages are shipped with the installer. As a
consequence, Git is expected not to localize messages at all, and skips the gettext initialization.
However, due to a change in MINGW-packages, the `gettext()` function's implicit initialization no longer
uses the runtime prefix but uses the hard-coded path `C:\mingw64\share\locale` to look for localized
messages. And since any authenticated user has the permission to create folders in `C:\` (and since
`C:\mingw64` does not typically exist), it is possible for low-privilege users to place fake messages in
that location where `git.exe` will pick them up in version 2.40.1. This vulnerability is relatively hard
to exploit and requires social engineering. For example, a legitimate message at the end of a clone could
be maliciously modified to ask the user to direct their web browser to a malicious website, and the user
might think that the message comes from Git and is legitimate. It does require local write access by the
attacker, though, which makes this attack vector less likely. Version 2.40.1 contains a patch for this
issue. Some workarounds are available. Do not work on a Windows machine with shared accounts, or
alternatively create a `C:\mingw64` folder and leave it empty. Users who have administrative rights may
remove the permission to create folders in `C:\`. (CVE-2023-25815)
- Git is a revision control system. Prior to versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8,
2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1, a specially crafted `.gitmodules` file with submodule URLs
that are longer than 1024 characters can used to exploit a bug in
`config.c::git_config_copy_or_rename_section_in_file()`. This bug can be used to inject arbitrary
configuration into a user's `$GIT_DIR/config` when attempting to remove the configuration section
associated with that submodule. When the attacker injects configuration values which specify executables
to run (such as `core.pager`, `core.editor`, `core.sshCommand`, etc.) this can lead to a remote code
execution. A fix A fix is available in versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6,
2.37.7, 2.38.5, 2.39.3, and 2.40.1. As a workaround, avoid running `git submodule deinit` on untrusted
repositories or without prior inspection of any submodule sections in `$GIT_DIR/config`. (CVE-2023-29007)
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-2023-3431
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dbe50494");
script_set_attribute(attribute:"solution", value:
"Update the affected git packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-25652");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-29007");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/04/25");
script_set_attribute(attribute:"patch_publication_date", value:"2023/12/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/16");
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:uvp:3.0.6.0");
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) 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/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/uvp_version");
exit(0);
}
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var _release = get_kb_item("Host/EulerOS/release");
if (isnull(_release) || _release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "3.0.6.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.6.0");
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);
var flag = 0;
var pkgs = [
"git-2.19.1-1.h16.eulerosv2r8",
"git-core-2.19.1-1.h16.eulerosv2r8",
"git-core-doc-2.19.1-1.h16.eulerosv2r8",
"perl-Git-2.19.1-1.h16.eulerosv2r8"
];
foreach (var pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "git");
}
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
77.3%