The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6050-2 advisory.
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)
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 Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6050-2. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('compat.inc');
if (description)
{
script_id(175976);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");
script_cve_id("CVE-2023-25652", "CVE-2023-29007");
script_xref(name:"USN", value:"6050-2");
script_name(english:"Ubuntu 16.04 ESM : Git vulnerabilities (USN-6050-2)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-6050-2 advisory.
- 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)
- 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 Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-6050-2");
script_set_attribute(attribute:"solution", value:
"Update the affected 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:"2023/05/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/05/17");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-all");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-arch");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-core");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-cvs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-daemon-run");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-daemon-sysvinit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-el");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-email");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-gui");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-man");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-mediawiki");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-svn");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gitk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gitweb");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2023 Canonical, Inc. / NASL script (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
exit(0);
}
include('debian_package.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var pkgs = [
{'osver': '16.04', 'pkgname': 'git', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-all', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-arch', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-core', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-cvs', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-daemon-run', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-daemon-sysvinit', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-el', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-email', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-gui', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-man', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-mediawiki', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'git-svn', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'gitk', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'},
{'osver': '16.04', 'pkgname': 'gitweb', 'pkgver': '1:2.7.4-0ubuntu1.10+esm7'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var osver = NULL;
var pkgname = NULL;
var pkgver = NULL;
if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
if (osver && pkgname && pkgver) {
if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : ubuntu_report_get()
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'git / git-all / git-arch / git-core / git-cvs / git-daemon-run / etc');
}