9.8 High
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
10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
0.107 Low
EPSS
Percentile
95.0%
Successful exploitation of these vulnerabilities could allow an attacker to send a malformed HTTP packet causing certain functions to fail, achieve a man-in-the-middle attack, or arbitrary code execution.
The following products from Siemens are affected:
3.2.1 CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319
A user can tell curl from version 7.20.0 to version 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (--ssl-reqd
on the command line orCURLOPT_USE_SSL
set to CURLUSESSL_CONTROL
or CURLUSESSL_ALL
withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response. This flaw would then make curl silently continue its operations without TLS contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.
CVE-2021-22946 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND (‘OS COMMAND INJECTION’) CWE-78
The c_rehash script does not properly sanitize shell metacharacters to prevent command injection.
CVE-2022-1292 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.3 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND (‘OS COMMAND INJECTION’) CWE-78
In addition to the c_rehash shell command injection identified in CVE-2022-1292, further circumstances where the c_rehash script does not properly sanitize shell metacharacters to prevent command injection were found by code review. When the CVE-2022-1292 was fixed it was not discovered that there are other places in the script where the file names of certificates being hashed were possibly passed to a command executed through the shell. This script is distributed by some operating systems in a manner where it is automatically executed. On such operating systems, an attacker could execute arbitrary commands with the privileges of the script. Use of the c_rehash script is considered obsolete and should be replaced by the OpenSSL rehash command line tool.
CVE-2022-2068 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.4 IMPROPER AUTHENTICATION CWE-287
An improper authentication vulnerability exists in curl 7.33.0 to and including 7.82.0 which might allow reuse OAUTH2-authenticated connections without properly making sure that the connection was authenticated with the same credentials as set for this transfer. This affects SASL-enabled protocols: SMPTP(S), IMAP(S), POP3(S) and LDAP(S) (openldap only).
CVE-2022-22576 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
3.2.5 BUFFER COPY WITHOUT CHECKING SIZE OF INPUT (‘CLASSIC BUFFER OVERFLOW’) CWE-120
Rsyslog is a system for log processing. Modules for TCP syslog reception have a potential heap buffer overflow when octet-counted framing is used. This can result in a segfault or some other malfunction. This vulnerability cannot be used for remote code execution, but there may still be a slight chance for experts to do that. The bug occurs when the octet count is read. While there is a check for the maximum number of octets, digits are written to a heap buffer even when the octet count is over the maximum. This can be used to overrun the memory buffer. However, once the sequence of digits stops, no additional characters can be added to the buffer. In our opinion, this makes remote exploits impossible or at least highly complex. Octet-counted framing is one of two potential framing modes enabled by default on receivers. Modules imtcp
, imptcp
, imgssapi
, and imhttp
are used for regular syslog message reception. It is best practice not to directly expose them to the public. When this practice is followed, the risk is considerably lower. Module imdiag
is a diagnostics module primarily intended for testbench runs. Octet-counted framing is not very common. Usually, it needs to be specifically enabled at senders. If users do not need it, they can turn it off for the most important modules. This will mitigate the vulnerability.
CVE-2022-24903 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.6 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
libcurl provides the CURLOPT_CERTINFO
option to allow applications to request details to be returned about a server’s certificate chain. Due to an erroneous function, a malicious server could make libcurl built with NSS get stuck in a never-ending busy-loop when trying to retrieve that information.
CVE-2022-27781 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
3.2.7 IMPROPER CERTIFICATE VALIDATION CWE-295
libcurl would reuse a previously created connection even when a TLS or SSH related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, several TLS and SSH settings were left out from the configuration match checks, making them match too easily.
CVE-2022-27782 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).
3.2.8 CROSS-SITE REQUEST FORGERY (CSRF) CWE-352
The web interface of the affected devices is vulnerable to cross-site request forgery attacks. By tricking an authenticated victim user to click a malicious link, an attacker could perform arbitrary actions on the device on behalf of the victim user.
CVE-2022-29561 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
3.2.9 IMPROPER INPUT VALIDATION CWE-20
Affected devices do not properly handle malformed HTTP packets. This could allow an unauthenticated remote attacker to send a malformed HTTP packet causing certain functions to fail in a controlled manner.
CVE-2022-29562 has been assigned to this vulnerability. A CVSS v3 base score of 3.7 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
3.2.10 INCORRECT DEFAULT PERMISSIONS CWE-276
When curl prior to 7.84.0 saves cookies, alt-svc and hsts data to local files, it makes the operation atomic by finalizing the operation with a rename from a temporary name to the final target file name. In that rename operation, it might accidentally widen the permissions for the target file, leaving the updated file accessible to more users than intended.
CVE-2022-32207 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.11 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION (‘CROSS-SITE SCRIPTING’) CWE-79
A reflected cross-site scripting (XSS) vulnerability exists in the web interface of the affected application that could allow an attacker to execute malicious javascript code by tricking users into accessing a malicious link. The value is reflected in the response without sanitization while throwing an “invalid params element name” error on the get_elements parameters.
CVE-2023-36386 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
3.2.12 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION (‘CROSS-SITE SCRIPTING’) CWE-79
A reflected cross-site scripting (XSS) vulnerability exists in the web interface of the affected application that could allow an attacker to execute malicious javascript code by tricking users into accessing a malicious link. The malformed value is reflected directly in the response without sanitization while throwing an “invalid path” error.
CVE-2023-36389 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
3.2.13 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION (‘CROSS-SITE SCRIPTING’) CWE-79
A reflected cross-site scripting (XSS) vulnerability exists in the web interface of the affected application that could allow an attacker to execute malicious javascript code by tricking users into accessing a malicious link. The value is reflected in the response without sanitization while throwing an “invalid params element name” error on the action parameters.
CVE-2023-36390 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
3.2.14 INADEQUATE ENCRYPTION STRENGTH CWE-326
The affected devices are configured to offer weak ciphers by default. This could allow an unauthorized attacker in a man-in-the-middle position to read and modify any data passed over to and from the affected device.
CVE-2023-36748 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L).
3.2.15 USE OF A BROKEN OR RISKY CRYPTOGRAPHIC ALGORITHM CWE-327
The webserver of the affected devices supports insecure TLS 1.0 protocol. An attacker could achieve a man-in-the-middle attack and compromise confidentiality and integrity of data.
CVE-2023-36749 has been assigned to this vulnerability. A CVSS v3 base score of 7.4 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).
3.2.16 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
The software upgrade URL parameter in the web interface of affected devices is vulnerable to command injection due to missing server-side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.
CVE-2023-36750 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
3.2.17 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
The install-app URL parameter in the web interface of affected devices is vulnerable to command injection due to missing server-side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.
CVE-2023-36751 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
3.2.18 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
The upgrade-app URL parameter in the web interface of affected devices is vulnerable to command injection due to missing server-side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.
CVE-2023-36752 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
3.2.19 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
The uninstall-app App-name parameter in the web interface of affected devices is vulnerable to command injection due to missing server-side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.
CVE-2023-36753 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
3.2.20 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
The SCEP server configuration URL parameter in the web interface of affected devices is vulnerable to command injection due to missing server-side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.
CVE-2023-36754 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
3.2.21 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
The SCEP CA Certificate Name parameter in the web interface of affected devices is vulnerable to command injection due to missing server-side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.
CVE-2023-36755 has been assigned to this vulnerability. A CVSS v3 base score of 9.1 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
Siemens reported these vulnerabilities to CISA.
Siemens recommends users update the product to the following versions:
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens’ operational guidelines for Industrial Security, and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: <https://www.siemens.com/industrialsecurity>
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: <https://www.siemens.com/cert/advisories>
As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.
For more information see the associated Siemens security advisory SSA-146325 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target these vulnerabilities.
cert-portal.siemens.com/productcert/csaf/ssa-146325.json
cert-portal.siemens.com/productcert/html/ssa-146325.html
cisa.gov/ics
cisa.gov/ics
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nvd.nist.gov/vuln/detail/CVE-2021-22946
nvd.nist.gov/vuln/detail/CVE-2022-1292
nvd.nist.gov/vuln/detail/CVE-2022-2068
nvd.nist.gov/vuln/detail/CVE-2022-22576
nvd.nist.gov/vuln/detail/CVE-2022-24903
nvd.nist.gov/vuln/detail/CVE-2022-27781
nvd.nist.gov/vuln/detail/CVE-2022-27782
nvd.nist.gov/vuln/detail/CVE-2022-29561
nvd.nist.gov/vuln/detail/CVE-2022-29562
nvd.nist.gov/vuln/detail/CVE-2022-32207
nvd.nist.gov/vuln/detail/CVE-2023-36386
nvd.nist.gov/vuln/detail/CVE-2023-36389
nvd.nist.gov/vuln/detail/CVE-2023-36390
nvd.nist.gov/vuln/detail/CVE-2023-36748
nvd.nist.gov/vuln/detail/CVE-2023-36749
nvd.nist.gov/vuln/detail/CVE-2023-36750
nvd.nist.gov/vuln/detail/CVE-2023-36751
nvd.nist.gov/vuln/detail/CVE-2023-36752
nvd.nist.gov/vuln/detail/CVE-2023-36753
nvd.nist.gov/vuln/detail/CVE-2023-36754
nvd.nist.gov/vuln/detail/CVE-2023-36755
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9.8 High
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
10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
0.107 Low
EPSS
Percentile
95.0%