According to the versions of the openssl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when     processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to     trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in TLSv1.3     if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured     and the default anti-replay protection is in use). In this case, under certain conditions, the session     cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache     will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario     for this failure to force a Denial of Service. It may also happen by accident in normal operation. This     issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in     3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this     issue.(CVE-2024-2511)

Tenable has extracted the preceding description block directly from the EulerOS openssl security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2024:1633-1 advisory.

  - Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when     processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to     trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in TLSv1.3     if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured     and the default anti-replay protection is in use). In this case, under certain conditions, the session     cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache     will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario     for this failure to force a Denial of Service. It may also happen by accident in normal operation. This     issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in     3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue.
    (CVE-2024-2511)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2539 advisory.

    Issue summary: Some non-default TLS server configurations can cause unboundedmemory growth when processing     TLSv1.3 sessions

    Impact summary: An attacker may exploit certain server configurations to triggerunbounded memory growth     that would lead to a Denial of Service

    This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option isbeing used (but not if     early_data support is also configured and the defaultanti-replay protection is in use). In this case,     under certain conditions, thesession cache can get into an incorrect state and it will fail to flush     properlyas it fills. The session cache will continue to grow in an unbounded manner. Amalicious client     could deliberately create the scenario for this failure toforce a Denial of Service. It may also happen by     accident in normal operation.

    This issue only affects TLS servers supporting TLSv1.3. It does not affect TLSclients.

    The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL1.0.2 is also not affected by     this issue. (CVE-2024-2511)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2024:1949-1 advisory.

    - CVE-2024-2511: Fixed unconstrained session cache growth in TLSv1.3 (bsc#1222548).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the openssl-3.2.2-1.el9 build changelog.

  - Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when     processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to     trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in TLSv1.3     if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured     and the default anti-replay protection is in use). In this case, under certain conditions, the session     cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache     will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario     for this failure to force a Denial of Service. It may also happen by accident in normal operation. This     issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in     3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue.
    (CVE-2024-2511)

  - Issue summary: Checking excessively long DSA keys or parameters may be very slow. Impact summary:
    Applications that use the functions EVP_PKEY_param_check() or EVP_PKEY_public_check() to check a DSA     public key or DSA parameters may experience long delays. Where the key or parameters that are being     checked have been obtained from an untrusted source this may lead to a Denial of Service. The functions     EVP_PKEY_param_check() or EVP_PKEY_public_check() perform various checks on DSA parameters. Some of those     computations take a long time if the modulus (`p` parameter) is too large. Trying to use a very large     modulus is slow and OpenSSL will not allow using public keys with a modulus which is over 10,000 bits in     length for signature verification. However the key and parameter check functions do not limit the modulus     size when performing the checks. An application that calls EVP_PKEY_param_check() or     EVP_PKEY_public_check() and supplies a key or parameters obtained from an untrusted source could be     vulnerable to a Denial of Service attack. These functions are not called by OpenSSL itself on untrusted     DSA keys so only applications that directly call these functions may be vulnerable. Also vulnerable are     the OpenSSL pkey and pkeyparam command line applications when using the `-check` option. The OpenSSL     SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are affected     by this issue. (CVE-2024-4603)

  - Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause memory to be accessed that was     previously freed in some situations Impact summary: A use after free can have a range of potential     consequences such as the corruption of valid data, crashes or execution of arbitrary code. However, only     applications that directly call the SSL_free_buffers function are affected by this issue. Applications     that do not call this function are not vulnerable. Our investigations indicate that this function is     rarely used by applications. The SSL_free_buffers function is used to free the internal OpenSSL buffer     used when processing an incoming record from the network. The call is only expected to succeed if the     buffer is not currently in use. However, two scenarios have been identified where the buffer is freed even     when still in use. The first scenario occurs where a record header has been received from the network and     processed by OpenSSL, but the full record body has not yet arrived. In this case calling SSL_free_buffers     will succeed even though a record has only been partially processed and the buffer is still in use. The     second scenario occurs where a full record containing application data has been received and processed by     OpenSSL but the application has only read part of this data. Again a call to SSL_free_buffers will succeed     even though the buffer is still in use. While these scenarios could occur accidentally during normal     operation a malicious attacker could attempt to engineer a stituation where this occurs. We are not aware     of this issue being actively exploited. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this     issue. Found by William Ahern (Akamai). Fix developed by Matt Caswell. Fix developed by Watson Ladd     (Akamai). Fixed in OpenSSL 3.3.1 (Affected since 3.3.0). (CVE-2024-4741)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3942 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3942-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Sean Whitton     October 31, 2024                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : openssl     Version        : 1.1.1n-0+deb11u6     CVE ID         : CVE-2023-5678 CVE-2024-0727 CVE-2024-2511 CVE-2024-4741                      CVE-2024-5535 CVE-2024-9143     Debian Bug     : 1055473 1061582 1068658 1072113 1074487 1085378

    Multiple vulnerabilities were discovered in OpenSSL, the Secure Sockets     Layer toolkit.

    CVE-2023-5678

        A denial of service could occur with excessively long X9.42 DH keys.

    CVE-2024-0727

        A denial of service could occur with a null field in a PKCS12 file.

    CVE-2024-2511

        A denial of service could occur when the SSL_OP_NO_TICKET flag is         set, with TLSv1.3.

    CVE-2024-4741

        A use-after-free problem was found in the SSL_free_buffers function.

    CVE-2024-5535

        Calling the OpenSSL API function SSL_select_next_proto with an empty         supported client protocols buffer may cause a crash or memory         contents to be sent to the peer.

    CVE-2024-9143

        Use of the low-level GF(2^m) elliptic curve APIs with untrusted         explicit values for the field polynomial can lead to out-of-bounds         memory reads or writes.  This could lead to information disclosure         or possibly remote code execution.

    For Debian 11 bullseye, these problems have been fixed in version     1.1.1n-0+deb11u6.

    We recommend that you upgrade your openssl packages.

    For the detailed security status of openssl please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/openssl

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions

Impact summary: An attacker may exploit certain server configurations to trigger unbounded memory growth that would lead to a Denial of Service.

This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured and the default anti-replay protection is in use). In this case, under certain conditions, the session cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache will continue to grow in an unbounded manner.

A malicious client could deliberately create the scenario for this failure to force a Denial of Service. It may also happen by accident in normal operation. This issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue. 

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
205914	EulerOS 2.0 SP12 : openssl (EulerOS-SA-2024-2223)	Nessus	Huawei Local Security Checks	2024/8/20	2025/3/31	medium
197058	SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2024:1633-1)	Nessus	SuSE Local Security Checks	2024/5/15	2024/5/15	medium
197110	Amazon Linux 2 : edk2 (ALAS-2024-2539)	Nessus	Amazon Linux Local Security Checks	2024/5/15	2025/3/31	medium
200234	SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2024:1949-1)	Nessus	SuSE Local Security Checks	2024/6/8	2024/6/8	medium
200325	CentOS 9 : openssl-3.2.2-1.el9	Nessus	CentOS Local Security Checks	2024/6/11	2024/11/14	high
209978	Debian dla-3942 : libcrypto1.1-udeb - security update	Nessus	Debian Local Security Checks	2024/10/31	2025/4/14	high
502258	Siemens SIMATIC S7-1500 Uncontrolled Resource Consumption (CVE-2024-2511)	Tenable OT Security	Tenable.ot	2024/6/3	2025/3/31	medium

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