The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 2fcca7e4-b1d7-11ed-b0f4-002590f2a714 advisory.
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)Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# @NOAGENT@
#
# The descriptive text and package checks in this plugin were
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2021 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
# copyright notice, this list of conditions and the following
# disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
# published online in any format, converted to PDF, PostScript,
# RTF and other formats) must reproduce the above copyright
# notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
include('compat.inc');
if (description)
{
script_id(171695);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/02/21");
script_cve_id("CVE-2022-41903");
script_name(english:"FreeBSD : git -- Heap overflow in `git archive`, `git log --format` leading to RCE (2fcca7e4-b1d7-11ed-b0f4-002590f2a714)");
script_set_attribute(attribute:"synopsis", value:
"The remote FreeBSD host is missing one or more security-related updates.");
script_set_attribute(attribute:"description", value:
"The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the 2fcca7e4-b1d7-11ed-b0f4-002590f2a714 advisory.
- 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)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
# https://github.blog/2023-01-17-git-security-vulnerabilities-announced-2/#cve-2022-41903
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?28eee891");
# https://vuxml.freebsd.org/freebsd/2fcca7e4-b1d7-11ed-b0f4-002590f2a714.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1c54770f");
script_set_attribute(attribute:"solution", value:
"Update the affected 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:"2023/01/17");
script_set_attribute(attribute:"patch_publication_date", value:"2023/02/21");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/02/21");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:git");
script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"FreeBSD 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/FreeBSD/release", "Host/FreeBSD/pkg_info");
exit(0);
}
include("freebsd_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);
var flag = 0;
var packages = [
'git<2.39.1'
];
foreach var package( packages ) {
if (pkg_test(save_report:TRUE, pkg: package)) flag++;
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : pkg_report_get()
);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");