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

  - libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are     required in the case of a large token for which multiple buffer fills are needed. (CVE-2023-52425)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2024:1615 advisory.

    Expat is a C library for parsing XML documents.

    Security Fix(es):

    * expat: parsing large tokens can trigger a denial of service (CVE-2023-52425)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 a vulnerability as referenced in the ELSA-2024-1615 advisory.

    - lib: Prevent integer overflow in doProlog [CVE-2022-23990][Orabug: 33910314]
    - CVE-2023-52425 expat: parsing large tokens can trigger a denial of service

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 Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3783 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3783-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Tobias Frost     April 07, 2024                                https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : expat     Version        : 2.2.6-2+deb10u7     CVE ID         : CVE-2023-52425     Debian Bug     : 1063238

    Expat, an XML parsing C library has been found to have an vulnerability     that allows an attacker to perform a denial of service (resource     consumption, when many full reparsings are required in the case of a     large tokens.

    When parsing a really big token that requires multiple buffer fills to     complete, expat has to re-parse the token from start multiple times,     which takes time. These patches introduce a heuristic that, when having     failed on the same token multiple times, defers further parsing until     there's significantly more data available.

    The patch also introduces an optiional API,     XML_SetReparseDeferralEnabled(), to disable the new heuristic.

    For Debian 10 buster, this problem has been fixed in version     2.2.6-2+deb10u7.

    We recommend that you upgrade your expat packages.

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

    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 this issue but has instead relied only on the application's self-reported version number.

The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2024:1615 advisory.

  - libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are     required in the case of a large token for which multiple buffer fills are needed. (CVE-2023-52425)

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

The version of expat installed on the remote host is prior to 2.6.0. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2024-038-01 advisory.

  - libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are     required in the case of a large token for which multiple buffer fills are needed. (CVE-2023-52425)

  - libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.
    (CVE-2023-52426)

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

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2024-fbe1f0c1aa advisory.

    Update to 2.6.0, fixes CVE-2023-52425, CVE-2023-52426.

Tenable has extracted the preceding description block directly from the Fedora 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 remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:2479-1 advisory.

    - CVE-2023-52425: Fixed backport so it uses features sniffing, not just comparing version number     (bsc#1219559).
    - CVE-2024-0450: Fixed detecting the vulnerability of 'quoted-overlap' zipbomb (bsc#1221854).
    - CVE-2024-4032: Rearranging definition of private v global IP. (bsc#1226448)
    - CVE-2024-0397: Remove a memory race condition in ssl.SSLContext certificate store methods. (bsc#1226447)

Tenable has extracted the preceding description block directly from the SUSE 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 AHV installed on the remote host is prior to 20230302.102005. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-20230302.2024 advisory.

  - This flaw allows a malicious HTTP server to set super cookies in curl that are then passed back to more     origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get     sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in     curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a     cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though     `co.uk` is listed as a PSL domain. (CVE-2023-46218)

  - Use after free in tcpslice triggers AddressSanitizer, no other confirmed impact. (CVE-2021-41043)

  - Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote     attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the     KeyTrap issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the     protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG     records. (CVE-2023-50387)

  - The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped)     allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC     responses in a random subdomain attack, aka the NSEC3 issue. The RFC 5155 specification implies that an     algorithm must perform thousands of iterations of a hash function in certain situations. (CVE-2023-50868)

  - close_altfile in filename.c in less before 606 omits shell_quote calls for LESSCLOSE. (CVE-2022-48624)

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 6.8.1. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-6.8.1 advisory.

  - There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure. Many EC algorithms are     affected, including some of the TLS 1.3 default curves. Impact was not analyzed in detail, because the     pre-requisites for attack are considered unlikely and include reusing private keys. Analysis suggests that     attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not     believed likely. Attacks against DH are considered just feasible (although very difficult) because most of     the work necessary to deduce information about a private key may be performed offline. The amount of     resources required for such an attack would be significant. However, for an attack on TLS to be     meaningful, the server would have to share the DH private key among multiple clients, which is no longer     an option since CVE-2016-0701. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0.0. It was     addressed in the releases of 1.1.1m and 3.0.1 on the 15th of December 2021. For the 1.0.2 release it is     addressed in git commit 6fc1aaaf3 that is available to premium support customers only. It will be made     available in 1.0.2zc when it is released. The issue only affects OpenSSL on MIPS platforms. Fixed in     OpenSSL 3.0.1 (Affected 3.0.0). Fixed in OpenSSL 1.1.1m (Affected 1.1.1-1.1.1l). Fixed in OpenSSL 1.0.2zc-     dev (Affected 1.0.2-1.0.2zb). (CVE-2021-4160)

  - CVE-2023-38545 is a heap-based buffer overflow vulnerability in the SOCKS5 proxy handshake in libcurl and     curl.  When curl is given a hostname to pass along to a SOCKS5 proxy that is greater than 255 bytes in     length, it will switch to local name resolution in order to resolve the address before passing it on to     the SOCKS5 proxy. However, due to a bug introduced in 2020, this local name resolution could fail due to a     slow SOCKS5 handshake, causing curl to pass on the hostname greater than 255 bytes in length into the     target buffer, leading to a heap overflow.  The advisory for CVE-2023-38545 gives an example exploitation     scenario of a malicious HTTPS server redirecting to a specially crafted URL. While it might seem that an     attacker would need to influence the slowness of the SOCKS5 handshake, the advisory states that server     latency is likely slow enough to trigger this bug. (CVE-2023-38545)

  - This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to     pass along the host name to the SOCKS5 proxy to allow that to resolve the address instead of it getting     done by curl itself, the maximum length that host name can be is 255 bytes. If the host name is detected     to be longer, curl switches to local name resolving and instead passes on the resolved address only. Due     to this bug, the local variable that means let the host resolve the name could get the wrong value     during a slow SOCKS5 handshake, and contrary to the intention, copy the too long host name to the target     buffer instead of copying just the resolved address there. The target buffer being a heap based buffer,     and the host name coming from the URL that curl has been told to operate with. (CVE-2023-38545)

  - An information disclosure vulnerability exists in curl <v8.1.0 when doing HTTP(S) transfers, libcurl might     erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when the     `CURLOPT_POSTFIELDS` option has been set, if the same handle previously wasused to issue a `PUT` request     which used that callback. This flaw may surprise the application and cause it to misbehave and either send     off the wrong data or use memory after free or similar in the second transfer. The problem exists in the     logic for a reused handle when it is (expected to be) changed from a PUT to a POST. (CVE-2023-28322)

  - This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the     specific series of conditions are met. libcurl performs transfers. In its API, an application creates     easy handles that are the individual handles for single transfers. libcurl provides a function call that     duplicates en easy handle called     [curl_easy_duphandle](https://curl.se/libcurl/c/curl_easy_duphandle.html). If a transfer has cookies     enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the     actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned     version of the handle would instead store the file name as `none` (using the four ASCII letters, no     quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from     would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in     the current directory of the program using libcurl. And if using the correct file format of course.
    (CVE-2023-38546)

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
226796	Linux Distros Unpatched Vulnerability : CVE-2023-52425	Nessus	Misc.	3/5/2025	3/5/2025	high
192871	RHEL 8 : expat (RHSA-2024:1615)	Nessus	Red Hat Local Security Checks	4/2/2024	4/2/2025	high
192909	Oracle Linux 8 : expat (ELSA-2024-1615)	Nessus	Oracle Linux Local Security Checks	4/3/2024	9/21/2024	high
193076	Debian dla-3783 : expat - security update	Nessus	Debian Local Security Checks	4/9/2024	1/22/2025	high
192955	Rocky Linux 8 : expat (RLSA-2024:1615)	Nessus	Rocky Linux Local Security Checks	4/5/2024	4/5/2024	high
190106	Slackware Linux 15.0 / current expat Multiple Vulnerabilities (SSA:2024-038-01)	Nessus	Slackware Local Security Checks	2/7/2024	4/5/2024	high
190963	Fedora 39 : mingw-expat (2024-fbe1f0c1aa)	Nessus	Fedora Local Security Checks	2/25/2024	11/14/2024	high
202464	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python3 (SUSE-SU-2024:2479-1)	Nessus	SuSE Local Security Checks	7/16/2024	7/16/2024	high
206822	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-20230302.2024)	Nessus	Misc.	9/9/2024	3/28/2025	high
202829	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-6.8.1)	Nessus	Misc.	7/22/2024	2/19/2025	medium

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