CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
56.5%
The remote Fedora 38 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2023-d486d13cfd advisory.
stb_image is a single file MIT licensed library for processing images. A crafted image file may trigger out of bounds memcpy read in stbi__gif_load_next
. This happens because two_back points to a memory address lower than the start of the buffer out. This issue may be used to leak internal memory allocation information. (CVE-2023-45661)
stb_image is a single file MIT licensed library for processing images. When stbi_set_flip_vertically_on_load
is set to TRUE
and req_comp
is set to a number that doesn’t match the real number of components per pixel, the library attempts to flip the image vertically. A crafted image file can trigger memcpy
out-of-bounds read because bytes_per_pixel
used to calculate bytes_per_row
doesn’t match the real image array dimensions. (CVE-2023-45662)
stb_image is a single file MIT licensed library for processing images. The stbi__getn function reads a specified number of bytes from context (typically a file) into the specified buffer. In case the file stream points to the end, it returns zero. There are two places where its return value is not checked: In the stbi__hdr_load
function and in the stbi__tga_load
function. The latter of the two is likely more exploitable as an attacker may also control the size of an uninitialized buffer. (CVE-2023-45663)
stb_image is a single file MIT licensed library for processing images. A crafted image file can trigger stbi__load_gif_main_outofmem
attempt to double-free the out variable. This happens in stbi__load_gif_main
because when the layers * stride
value is zero the behavior is implementation defined, but common that realloc frees the old memory and returns null pointer. Since it attempts to double-free the memory a few lines below the first free, the issue can be potentially exploited only in a multi-threaded environment. In the worst case this may lead to code execution. (CVE-2023-45664)
stb_image is a single file MIT licensed library for processing images. It may look like stbi__load_gif_main
doesn’t give guarantees about the content of output value *delays
upon failure.
Although it sets *delays
to zero at the beginning, it doesn’t do it in case the image is not recognized as GIF and a call to stbi__load_gif_main_outofmem
only frees possibly allocated memory in *delays
without resetting it to zero. Thus it would be fair to say the caller of stbi__load_gif_main
is responsible to free the allocated memory in *delays
only if stbi__load_gif_main
returns a non null value. However at the same time the function may return null value, but fail to free the memory in *delays
if internally stbi__convert_format
is called and fails. Thus the issue may lead to a memory leak if the caller chooses to free delays
only when stbi__load_gif_main
didn’t fail or to a double- free if the delays
is always freed (CVE-2023-45666)
stb_image is a single file MIT licensed library for processing images. If stbi__load_gif_main
in stbi_load_gif_from_memory
fails it returns a null pointer and may keep the z
variable uninitialized.
In case the caller also sets the flip vertically flag, it continues and calls stbi__vertical_flip_slices
with the null pointer result value and the uninitialized z
value. This may result in a program crash.
(CVE-2023-45667)
Double Free vulnerability in Nothings Stb Image.h v.2.28 allows a remote attacker to cause a denial of service via a crafted file to the stbi_load_gif_main function. (CVE-2023-43281)
stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of bounds write in f->vendor[len] = (char)'\0';
. The root cause is that if the len read in start_decoder
is -1
and len + 1
becomes 0 when passed to setup_malloc
. The setup_malloc
behaves differently when f->alloc.alloc_buffer
is pre-allocated. Instead of returning NULL
as in malloc
case it shifts the pre-allocated buffer by zero and returns the currently available memory block. This issue may lead to code execution. (CVE-2023-45675)
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 Fedora Security Advisory FEDORA-2023-d486d13cfd
#
include('compat.inc');
if (description)
{
script_id(184401);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/04");
script_cve_id(
"CVE-2023-43281",
"CVE-2023-45661",
"CVE-2023-45662",
"CVE-2023-45663",
"CVE-2023-45664",
"CVE-2023-45666",
"CVE-2023-45667",
"CVE-2023-45675"
);
script_xref(name:"FEDORA", value:"2023-d486d13cfd");
script_name(english:"Fedora 38 : stb / usd (2023-d486d13cfd)");
script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Fedora 38 host has packages installed that are affected by multiple vulnerabilities as referenced in the
FEDORA-2023-d486d13cfd advisory.
- stb_image is a single file MIT licensed library for processing images. A crafted image file may trigger
out of bounds memcpy read in `stbi__gif_load_next`. This happens because two_back points to a memory
address lower than the start of the buffer out. This issue may be used to leak internal memory allocation
information. (CVE-2023-45661)
- stb_image is a single file MIT licensed library for processing images. When
`stbi_set_flip_vertically_on_load` is set to `TRUE` and `req_comp` is set to a number that doesn't match
the real number of components per pixel, the library attempts to flip the image vertically. A crafted
image file can trigger `memcpy` out-of-bounds read because `bytes_per_pixel` used to calculate
`bytes_per_row` doesn't match the real image array dimensions. (CVE-2023-45662)
- stb_image is a single file MIT licensed library for processing images. The stbi__getn function reads a
specified number of bytes from context (typically a file) into the specified buffer. In case the file
stream points to the end, it returns zero. There are two places where its return value is not checked: In
the `stbi__hdr_load` function and in the `stbi__tga_load` function. The latter of the two is likely more
exploitable as an attacker may also control the size of an uninitialized buffer. (CVE-2023-45663)
- stb_image is a single file MIT licensed library for processing images. A crafted image file can trigger
`stbi__load_gif_main_outofmem` attempt to double-free the out variable. This happens in
`stbi__load_gif_main` because when the `layers * stride` value is zero the behavior is implementation
defined, but common that realloc frees the old memory and returns null pointer. Since it attempts to
double-free the memory a few lines below the first free, the issue can be potentially exploited only in
a multi-threaded environment. In the worst case this may lead to code execution. (CVE-2023-45664)
- stb_image is a single file MIT licensed library for processing images. It may look like
`stbi__load_gif_main` doesn't give guarantees about the content of output value `*delays` upon failure.
Although it sets `*delays` to zero at the beginning, it doesn't do it in case the image is not recognized
as GIF and a call to `stbi__load_gif_main_outofmem` only frees possibly allocated memory in `*delays`
without resetting it to zero. Thus it would be fair to say the caller of `stbi__load_gif_main` is
responsible to free the allocated memory in `*delays` only if `stbi__load_gif_main` returns a non null
value. However at the same time the function may return null value, but fail to free the memory in
`*delays` if internally `stbi__convert_format` is called and fails. Thus the issue may lead to a memory
leak if the caller chooses to free `delays` only when `stbi__load_gif_main` didn't fail or to a double-
free if the `delays` is always freed (CVE-2023-45666)
- stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in
`stbi_load_gif_from_memory` fails it returns a null pointer and may keep the `z` variable uninitialized.
In case the caller also sets the flip vertically flag, it continues and calls `stbi__vertical_flip_slices`
with the null pointer result value and the uninitialized `z` value. This may result in a program crash.
(CVE-2023-45667)
- Double Free vulnerability in Nothings Stb Image.h v.2.28 allows a remote attacker to cause a denial of
service via a crafted file to the stbi_load_gif_main function. (CVE-2023-43281)
- stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may
trigger out of bounds write in `f->vendor[len] = (char)'\0';`. The root cause is that if the len read in
`start_decoder` is `-1` and `len + 1` becomes 0 when passed to `setup_malloc`. The `setup_malloc` behaves
differently when `f->alloc.alloc_buffer` is pre-allocated. Instead of returning `NULL` as in `malloc` case
it shifts the pre-allocated buffer by zero and returns the currently available memory block. This issue
may lead to code execution. (CVE-2023-45675)
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://bodhi.fedoraproject.org/updates/FEDORA-2023-d486d13cfd");
script_set_attribute(attribute:"solution", value:
"Update the affected stb and / or usd 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: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: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-2023-45666");
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:"2023/10/21");
script_set_attribute(attribute:"patch_publication_date", value:"2023/10/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:38");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:stb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:usd");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Fedora 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/RedHat/release", "Host/RedHat/rpm-list");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Fedora' >!< os_release) audit(AUDIT_OS_NOT, 'Fedora');
var os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Fedora');
os_ver = os_ver[1];
if (! preg(pattern:"^38([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Fedora 38', 'Fedora ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Fedora', cpu);
var pkgs = [
{'reference':'stb-0^20231011gitbeebb24-12.fc38', 'release':'FC38', 'rpm_spec_vers_cmp':TRUE},
{'reference':'usd-22.05b-39.fc38', 'release':'FC38', 'rpm_spec_vers_cmp':TRUE}
];
var flag = 0;
foreach package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (reference && _release) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) 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, 'stb / usd');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43281
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45661
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45662
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45663
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45664
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45666
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45667
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45675
bodhi.fedoraproject.org/updates/FEDORA-2023-d486d13cfd
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
56.5%