The version of AOS installed on the remote host is prior to 5.17.1. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.17.1 advisory.

  - When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to     Apache Tomcat. Tomcat treats AJP connections as having higher trust than, for example, a similar HTTP     connection. If such connections are available to an attacker, they can be exploited in ways that may be     surprising. In Apache Tomcat 9.0.0.M1 to 9.0.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99, Tomcat shipped     with an AJP Connector enabled by default that listened on all configured IP addresses. It was expected     (and recommended in the security guide) that this Connector would be disabled if not required. This     vulnerability report identified a mechanism that allowed: - returning arbitrary files from anywhere in the     web application - processing any file in the web application as a JSP Further, if the web application     allowed file upload and stored those files within the web application (or the attacker was able to control     the content of the web application by some other means) then this, along with the ability to process a     file as a JSP, made remote code execution possible. It is important to note that mitigation is only     required if an AJP port is accessible to untrusted users. Users wishing to take a defence-in-depth     approach and block the vector that permits returning arbitrary files and execution as JSP may upgrade to     Apache Tomcat 9.0.31, 8.5.51 or 7.0.100 or later. A number of changes were made to the default AJP     Connector configuration in 9.0.31 to harden the default configuration. It is likely that users upgrading     to 9.0.31, 8.5.51 or 7.0.100 or later will need to make small changes to their configurations.
    (CVE-2020-1938)

  - rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel through 5.3.6 lacks a     certain upper-bound check, leading to a buffer overflow. (CVE-2019-17666)

  - The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-     free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c,     include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can     occur with FUSE requests. (CVE-2019-11487)

  - A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where,     the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error     occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by     the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction     mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism     to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that     host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.
    (CVE-2019-19338)

  - The xz_decomp function in xzlib.c in libxml2 2.9.1 does not properly detect compression errors, which     allows context-dependent attackers to cause a denial of service (process hang) via crafted XML data.
    (CVE-2015-8035)

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

This update for curl fixes the following issues :

Security issue fixed :

  - CVE-2019-5436: Fixed a heap buffer overflow exists in     tftp_receive_packet that receives data from a TFTP     server (bsc#1135170).

This update was imported from the SUSE:SLE-12:Update update project.

According to the version of the curl packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - 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)

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.

According to the versions of the curl packages installed, the EulerOS 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)

  - The ourWriteOut function in tool_writeout.c in curl     7.53.1 might allow physically proximate attackers to     obtain sensitive information from process memory in     opportunistic circumstances by reading a workstation     screen during use of a --write-out argument ending in a     '%' character, which leads to a heap-based buffer     over-read.(CVE-2017-7407)

  - Curl versions 7.14.1 through 7.61.1 are vulnerable to a     heap-based buffer over-read in the tool_msgs.c:voutf()     function that may result in information exposure and     denial of service.(CVE-2018-16842)

  - The ConnectionExists function in lib/url.c in libcurl     before 7.47.0 does not properly re-use     NTLM-authenticated proxy connections, which might allow     remote attackers to authenticate as other users via a     request, a similar issue to     CVE-2014-0015.(CVE-2016-0755)

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.

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 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 Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2020-1020 advisory.

    - Fix TFTP small blocksize heap buffer overflow     (https://curl.haxx.se/docs/CVE-2019-5482.html)[CVE-2019-5482][Orabug: 30568724]
    - CVE-2016-8615 cookie injection for other servers (https://curl.haxx.se/docs/CVE-2016-8615.html)
    - CVE-2016-8616 case insensitive password comparison (https://curl.haxx.se/docs/CVE-2016-8616.html)
    - CVE-2016-8617 OOB write via unchecked multiplication (https://curl.haxx.se/docs/CVE-2016-8617.html)
    - CVE-2016-8618 double-free in curl_maprintf (https://curl.haxx.se/docs/CVE-2016-8618.html)
    - CVE-2016-8619 double-free in krb5 code (https://curl.haxx.se/docs/CVE-2016-8619.html)
    - CVE-2016-8621 curl_getdate read out of bounds (https://curl.haxx.se/docs/CVE-2016-8621.html)
    - CVE-2016-8622 URL unescape heap overflow via integer truncation     (https://curl.haxx.se/docs/CVE-2016-8622.html)
    - CVE-2016-8623 Use-after-free via shared cookies (https://curl.haxx.se/docs/CVE-2016-8623.html)
    - CVE-2016-8624 invalid URL parsing with # (https://curl.haxx.se/docs/CVE-2016-8624.html)

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

An update of the curl package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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)

Note that Nessus relies on the presence of the package as reported by the vendor.

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.

The version of AOS installed on the remote host is prior to 5.18. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.18 advisory.

  - When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to     Apache Tomcat. Tomcat treats AJP connections as having higher trust than, for example, a similar HTTP     connection. If such connections are available to an attacker, they can be exploited in ways that may be     surprising. In Apache Tomcat 9.0.0.M1 to 9.0.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99, Tomcat shipped     with an AJP Connector enabled by default that listened on all configured IP addresses. It was expected     (and recommended in the security guide) that this Connector would be disabled if not required. This     vulnerability report identified a mechanism that allowed: - returning arbitrary files from anywhere in the     web application - processing any file in the web application as a JSP Further, if the web application     allowed file upload and stored those files within the web application (or the attacker was able to control     the content of the web application by some other means) then this, along with the ability to process a     file as a JSP, made remote code execution possible. It is important to note that mitigation is only     required if an AJP port is accessible to untrusted users. Users wishing to take a defence-in-depth     approach and block the vector that permits returning arbitrary files and execution as JSP may upgrade to     Apache Tomcat 9.0.31, 8.5.51 or 7.0.100 or later. A number of changes were made to the default AJP     Connector configuration in 9.0.31 to harden the default configuration. It is likely that users upgrading     to 9.0.31, 8.5.51 or 7.0.100 or later will need to make small changes to their configurations.
    (CVE-2020-1938)

  - rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel through 5.3.6 lacks a     certain upper-bound check, leading to a buffer overflow. (CVE-2019-17666)

  - The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-     free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c,     include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can     occur with FUSE requests. (CVE-2019-11487)

  - A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where,     the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error     occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by     the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction     mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism     to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that     host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.
    (CVE-2019-19338)

  - The xz_decomp function in xzlib.c in libxml2 2.9.1 does not properly detect compression errors, which     allows context-dependent attackers to cause a denial of service (process hang) via crafted XML data.
    (CVE-2015-8035)

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
164612	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.17.1)	Nessus	Misc.	9/1/2022	9/1/2025	critical
125693	openSUSE Security Update : curl (openSUSE-2019-1492)	Nessus	SuSE Local Security Checks	6/4/2019	5/17/2024	high
128891	EulerOS 2.0 SP2 : curl (EulerOS-SA-2019-1839)	Nessus	Huawei Local Security Checks	9/17/2019	4/25/2024	high
129247	EulerOS 2.0 SP3 : curl (EulerOS-SA-2019-2054)	Nessus	Huawei Local Security Checks	9/24/2019	4/23/2024	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
146018	CentOS 8 : curl (CESA-2020:1792)	Nessus	CentOS Local Security Checks	2/1/2021	1/24/2024	critical
180679	Oracle Linux 7 : curl (ELSA-2020-1020)	Nessus	Oracle Linux Local Security Checks	9/7/2023	10/22/2024	high
180880	Oracle Linux 8 : curl (ELSA-2020-1792)	Nessus	Oracle Linux Local Security Checks	9/7/2023	10/22/2024	critical
202877	Photon OS 2.0: Curl PHSA-2019-2.0-0161	Nessus	PhotonOS Local Security Checks	7/22/2024	7/22/2024	high
222931	Linux Distros Unpatched Vulnerability : CVE-2019-5436	Nessus	Misc.	3/4/2025	8/21/2025	high
236591	Alibaba Cloud Linux 3 : 0078: curl (ALINUX3-SA-2021:0078)	Nessus	Alibaba Cloud Linux Local Security Checks	5/14/2025	5/15/2025	critical
164595	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.18)	Nessus	Misc.	9/1/2022	9/1/2025	critical

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