The version of OpenSSL installed on the remote host is prior to 3.3.1. It is, therefore, affected by multiple vulnerabilities as referenced in the 3.3.1 advisory.

  - 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 3.1.6 (Affected since 3.1.0). (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.

Detections

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OpenSSL 3.3.0 < 3.3.1 Multiple Vulnerabilities

high Nessus Plugin ID 197189

Version 1.1