According to the versions of the git packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
Git is distributed revision control system. gitattributes are a mechanism to allow defining attributes for paths. These attributes can be defined by adding a .gitattributes
file to the repository, which contains a set of file patterns and the attributes that should be set for paths matching this pattern. When parsing gitattributes, multiple integer overflows can occur when there is a huge number of path patterns, a huge number of attributes for a single pattern, or when the declared attribute names are huge. These overflows can be triggered via a crafted .gitattributes
file that may be part of the commit history. Git silently splits lines longer than 2KB when parsing gitattributes from a file, but not when parsing them from the index. Consequentially, the failure mode depends on whether the file exists in the working tree, the index or both. This integer overflow can result in arbitrary heap reads and writes, which may result in remote code execution. The problem has been patched in the versions published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. There are no known workarounds for this issue. (CVE-2022-23521)
Git is distributed revision control system. git log
can display commits in an arbitrary format using its --format
specifiers. This functionality is also exposed to git archive
via the export-subst
gitattribute. When processing the padding operators, there is a integer overflow in pretty.c::format_and_pad_commit()
where a size_t
is stored improperly as an int
, and then added as an offset to a memcpy()
. This overflow can be triggered directly by a user running a command which invokes the commit formatting machinery (e.g., git log --format=...
). It may also be triggered indirectly through git archive via the export-subst mechanism, which expands format specifiers inside of files within the repository during a git archive. This integer overflow can result in arbitrary heap writes, which may result in arbitrary code execution. The problem has been patched in the versions published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. Users who are unable to upgrade should disable git archive
in untrusted repositories. If you expose git archive via git daemon
, disable it by running git config --global daemon.uploadArch false
. (CVE-2022-41903)
Git GUI is a convenient graphical tool that comes with Git for Windows. Its target audience is users who are uncomfortable with using Git on the command-line. Git GUI has a function to clone repositories.
Immediately after the local clone is available, Git GUI will automatically post-process it, among other things running a spell checker called aspell.exe
if it was found. Git GUI is implemented as a Tcl/Tk script. Due to the unfortunate design of Tcl on Windows, the search path when looking for an executable
always includes the current directory. Therefore, malicious repositories can ship with an aspell.exe
in their top-level directory which is executed by Git GUI without giving the user a chance to inspect it first, i.e. running untrusted code. This issue has been addressed in version 2.39.1. Users are advised to upgrade. Users unable to upgrade should avoid using Git GUI for cloning. If that is not a viable option, at least avoid cloning from untrusted sources. (CVE-2022-41953)
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(172683);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/18");
script_cve_id("CVE-2022-23521", "CVE-2022-41903", "CVE-2022-41953");
script_name(english:"EulerOS 2.0 SP10 : git (EulerOS-SA-2023-1548)");
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 :
- Git is distributed revision control system. gitattributes are a mechanism to allow defining attributes for
paths. These attributes can be defined by adding a `.gitattributes` file to the repository, which contains
a set of file patterns and the attributes that should be set for paths matching this pattern. When parsing
gitattributes, multiple integer overflows can occur when there is a huge number of path patterns, a huge
number of attributes for a single pattern, or when the declared attribute names are huge. These overflows
can be triggered via a crafted `.gitattributes` file that may be part of the commit history. Git silently
splits lines longer than 2KB when parsing gitattributes from a file, but not when parsing them from the
index. Consequentially, the failure mode depends on whether the file exists in the working tree, the index
or both. This integer overflow can result in arbitrary heap reads and writes, which may result in remote
code execution. The problem has been patched in the versions published on 2023-01-17, going back to
v2.30.7. Users are advised to upgrade. There are no known workarounds for this issue. (CVE-2022-23521)
- Git is distributed revision control system. `git log` can display commits in an arbitrary format using its
`--format` specifiers. This functionality is also exposed to `git archive` via the `export-subst`
gitattribute. When processing the padding operators, there is a integer overflow in
`pretty.c::format_and_pad_commit()` where a `size_t` is stored improperly as an `int`, and then added as
an offset to a `memcpy()`. This overflow can be triggered directly by a user running a command which
invokes the commit formatting machinery (e.g., `git log --format=...`). It may also be triggered
indirectly through git archive via the export-subst mechanism, which expands format specifiers inside of
files within the repository during a git archive. This integer overflow can result in arbitrary heap
writes, which may result in arbitrary code execution. The problem has been patched in the versions
published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. Users who are unable to
upgrade should disable `git archive` in untrusted repositories. If you expose git archive via `git
daemon`, disable it by running `git config --global daemon.uploadArch false`. (CVE-2022-41903)
- Git GUI is a convenient graphical tool that comes with Git for Windows. Its target audience is users who
are uncomfortable with using Git on the command-line. Git GUI has a function to clone repositories.
Immediately after the local clone is available, Git GUI will automatically post-process it, among other
things running a spell checker called `aspell.exe` if it was found. Git GUI is implemented as a Tcl/Tk
script. Due to the unfortunate design of Tcl on Windows, the search path when looking for an executable
_always includes the current directory_. Therefore, malicious repositories can ship with an `aspell.exe`
in their top-level directory which is executed by Git GUI without giving the user a chance to inspect it
first, i.e. running untrusted code. This issue has been addressed in version 2.39.1. Users are advised to
upgrade. Users unable to upgrade should avoid using Git GUI for cloning. If that is not a viable option,
at least avoid cloning from untrusted sources. (CVE-2022-41953)
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-2023-1548
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?90223347");
script_set_attribute(attribute:"solution", value:
"Update the affected git packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:H/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-2022-41903");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/01/10");
script_set_attribute(attribute:"patch_publication_date", value:"2023/03/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/03/18");
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-help");
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) 2023 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/sp");
script_exclude_keys("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 (_release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10");
var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(10)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10", "EulerOS UVP " + uvp);
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$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "x86" >!< cpu) audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
var flag = 0;
var pkgs = [
"git-2.27.0-2.h12.eulerosv2r10",
"git-help-2.27.0-2.h12.eulerosv2r10",
"perl-Git-2.27.0-2.h12.eulerosv2r10"
];
foreach (var pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"10", 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");
}