CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
40.8%
According to the versions of the curl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met. libcurl performs transfers. In its API, an application creates ‘easy handles’ that are the individual handles for single transfers. libcurl provides a function call that duplicates en easy handle called curl_easy_duphandle. If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as none
(using the four ASCII letters, no quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named none
- if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.
(CVE-2023-38546)
CVE-2023-38546 is a cookie injection vulnerability in the curl_easy_duphandle(), a function in libcurl that duplicates easy handles. When duplicating an easy handle, if cookies are enabled, the duplicated easy handle will not duplicate the cookies themselves, but would instead set the filename to none.’ Therefore, when the duplicated easy handle is subsequently used, if a source was not set for the cookies, libcurl would attempt to load them from the file named none’ on the disk. This vulnerability is rated low, as the various conditions required for exploitation are unlikely. (CVE-2023-38546)
This flaw allows a malicious HTTP server to set ‘super cookies’ in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in curl’s function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with domain=co.UK
when the URL used a lower case hostname curl.co.uk
, even though co.uk
is listed as a PSL domain. (CVE-2023-46218)
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(191833);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/12");
script_cve_id("CVE-2023-38546", "CVE-2023-46218");
script_xref(name:"IAVA", value:"2023-A-0531-S");
script_xref(name:"IAVA", value:"2023-A-0674-S");
script_xref(name:"CEA-ID", value:"CEA-2023-0052");
script_name(english:"EulerOS 2.0 SP8 : curl (EulerOS-SA-2024-1260)");
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 curl packages installed, the EulerOS installation on the remote host is affected by the
following vulnerabilities :
- This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the
specific series of conditions are met. libcurl performs transfers. In its API, an application creates
'easy handles' that are the individual handles for single transfers. libcurl provides a function call that
duplicates en easy handle called
[curl_easy_duphandle](https://curl.se/libcurl/c/curl_easy_duphandle.html). If a transfer has cookies
enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the
actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned
version of the handle would instead store the file name as `none` (using the four ASCII letters, no
quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from
would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in
the current directory of the program using libcurl. And if using the correct file format of course.
(CVE-2023-38546)
- CVE-2023-38546 is a cookie injection vulnerability in the curl_easy_duphandle(), a function in libcurl
that duplicates easy handles. When duplicating an easy handle, if cookies are enabled, the duplicated
easy handle will not duplicate the cookies themselves, but would instead set the filename to none.'
Therefore, when the duplicated easy handle is subsequently used, if a source was not set for the cookies,
libcurl would attempt to load them from the file named none' on the disk. This vulnerability is rated
low, as the various conditions required for exploitation are unlikely. (CVE-2023-38546)
- This flaw allows a malicious HTTP server to set 'super cookies' in curl that are then passed back to more
origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get
sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in
curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a
cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though
`co.uk` is listed as a PSL domain. (CVE-2023-46218)
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-2024-1260
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?377d7a33");
script_set_attribute(attribute:"solution", value:
"Update the affected curl packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
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:L/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-46218");
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:"2023/10/10");
script_set_attribute(attribute:"patch_publication_date", value:"2024/03/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/12");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:curl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libcurl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libcurl-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
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/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|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");
var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "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 ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);
var flag = 0;
var pkgs = [
"curl-7.61.1-2.h32.eulerosv2r8",
"libcurl-7.61.1-2.h32.eulerosv2r8",
"libcurl-devel-7.61.1-2.h32.eulerosv2r8"
];
foreach (var pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"8", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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, "curl");
}
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
40.8%