The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-1792 advisory.

    - double free due to subsequent call of realloc() (CVE-2019-5481)
    - fix heap buffer overflow in function tftp_receive_packet() (CVE-2019-5482)

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

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

According to the versions of the curl-openssl package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A heap buffer overflow in the TFTP receiving code     allows for DoS or arbitrary code execution in libcurl     versions 7.19.4 through 7.64.1.(CVE-2019-5436)

  - Heap buffer overflow in the TFTP protocol handler in     cURL 7.19.4 to 7.65.3.(CVE-2019-5482)

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.

The version of MySQL running on the remote host is 5.7.x prior to 5.7.29. It is, therefore, affected by multiple vulnerabilities, including three of the top vulnerabilities below, as noted in the January 2020 Critical Patch Update advisory:

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Compiling (cURL)). Supported   versions that are affected are 5.7.28 and prior and 8.0.18 and prior. Easily exploitable vulnerability allows   unauthenticated attacker with network access via multiple protocols to compromise MySQL Server. Successful   attacks of this vulnerability can result in takeover of MySQL Server (CVE-2019-5482).

  - Unspecified vulnerability in the optimizer component of Oracle MySQL Server. An authenticated, remote attacker   could exploit this issue, to compromise the availability of the application (CVE-2020-2579).

  - Unspecified vulnerabilities in the InnoDB component of Oracle MySQL Server. An authenticated, remote attacker   could exploit these issues, to compromise the availability of the application (CVE-2020-2577, CVE-2020-2589).

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

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:1792 advisory.

  - curl: TFTP receive heap buffer overflow in tftp_receive_packet() function (CVE-2019-5436)

  - curl: double free due to subsequent call of realloc() (CVE-2019-5481)

  - curl: heap buffer overflow in function tftp_receive_packet() (CVE-2019-5482)

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2021:0078 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2019-3822:
    libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The     function creating an outgoing NTLM type-3 header     (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents     based on previously received data. The check that exists to prevent the local buffer from getting     overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from     happening. This output data can grow larger than the local buffer if very large 'nt response' data is     extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large     value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes     from the NTLMv2 type-2 response header.

    CVE-2019-3823:
    libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code     handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and     contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads     beyond the allocated buffer. The read contents will not be returned to the caller.

    CVE-2019-5436:
    A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl     versions 7.19.4 through 7.64.1.

    CVE-2019-5481:
    Double-free vulnerability in the FTP-kerberos code in cURL 7.52.0 to 7.65.3.

    CVE-2019-5482:
    Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3.

    CVE-2020-8177:
    curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources     that can lead too overwriting a local file when the -J flag is used.

    CVE-2020-8231:
    Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending     data.

    CVE-2020-8284:
    A malicious server can use the FTP PASV response to trick curl 7.73.0 and earlier into connecting back to     a given IP address and port, and this way potentially make curl extract information about services that     are otherwise private and not disclosed, for example doing port scanning and service banner extractions.

    CVE-2020-8285:
    curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue     in FTP wildcard match parsing.

    CVE-2020-8286:
    curl 7.41.0 through 7.73.0 is vulnerable to an improper check for certificate revocation due to     insufficient verification of the OCSP response.

    CVE-2021-22946:
    A user can tell curl >= 7.20.0 and <= 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 or`CURLOPT_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
    **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear     text over the network.

    CVE-2021-22947:
    When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to     upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches.
    curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using     and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw,     it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS     traffic from the legitimate server and trick curl into sending data back to the user thinking the     attacker's injected data comes from the TLS-protected server.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

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

ID	Name	Product	Family	Published	Updated	Severity
180880	Oracle Linux 8 : curl (ELSA-2020-1792)	Nessus	Oracle Linux Local Security Checks	9/7/2023	10/22/2024	critical
134744	EulerOS Virtualization 3.0.2.2 : curl-openssl (EulerOS-SA-2020-1278)	Nessus	Huawei Local Security Checks	3/20/2020	3/21/2024	critical
132957	MySQL 5.7.x < 5.7.29 Multiple Vulnerabilities (Jan 2020 CPU)	Nessus	Databases	1/16/2020	10/21/2022	critical
146018	CentOS 8 : curl (CESA-2020:1792)	Nessus	CentOS Local Security Checks	2/1/2021	1/24/2024	critical
236591	Alibaba Cloud Linux 3 : 0078: curl (ALINUX3-SA-2021:0078)	Nessus	Alibaba Cloud Linux Local Security Checks	5/14/2025	5/15/2025	high

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