The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3235-1 advisory.

    It was discovered that libxml2 incorrectly handled format strings. If a user or automated system were     tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash,     resulting in a denial of service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS, and Ubuntu     16.04 LTS. (CVE-2016-4448)

    It was discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated     system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash,     resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-4658)

    Nick Wellnhofer discovered that libxml2 incorrectly handled certain malformed documents. If a user or     automated system were tricked into opening a specially crafted document, an attacker could cause libxml2     to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-5131)

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

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 libxml2 fixes the following issues :

  - CVE-2016-4658: use-after-free error could lead to crash     [bsc#1005544]

  - Fix NULL dereference in xpointer.c when in recovery mode     [bsc#1014873]

  - CVE-2016-9597: An XML document with many opening tags     could have caused a overflow of the stack not detected     by the recursion limits, allowing for DoS (bsc#1017497).
    For CVE-2016-9318 we decided not to ship a fix since it     can break existing setups. Please take appropriate     actions if you parse untrusted XML files and use the new
    -noxxe flag if possible (bnc#1010675, bnc#1013930).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Update to latest upstream release, includes several security related fixes.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of AOS installed on the remote host is prior to 6.1.1. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-6.1.1 advisory.

  - JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write     access to the Log4j configuration. The attacker can provide TopicBindingName and     TopicConnectionFactoryBindingName configurations causing JMSAppender to perform JNDI requests that result     in remote code execution in a similar fashion to CVE-2021-44228. Note this issue only affects Log4j 1.2     when specifically configured to use JMSAppender, which is not the default. Apache Log4j 1.2 reached end of     life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the     previous versions. (CVE-2021-4104)

  - It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-     default configurations. This could allows attackers with control over Thread Context Map (MDC) input data     when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for     example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input     data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some     environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix     this issue by removing support for message lookup patterns and disabling JNDI functionality by default.
    (CVE-2021-45046)

  - Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI     features used in configuration, log messages, and parameters do not protect against attacker controlled     LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters     can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From     log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3,     and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to     log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
    (CVE-2021-44228)

  - xpointer.c in libxml2 before 2.9.5 (as used in Apple iOS before 10, OS X before 10.12, tvOS before 10, and     watchOS before 3, and other products) does not forbid namespace nodes in XPointer ranges, which allows     remote attackers to execute arbitrary code or cause a denial of service (use-after-free and memory     corruption) via a crafted XML document. (CVE-2016-4658)

  - NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow     when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures     encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for     certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how     they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and     PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and     Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.
    (CVE-2021-43527)

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

Update to 2.9.7 which hopefully fixes all security issues

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
97793	Ubuntu 14.04 LTS / 16.04 LTS : libxml2 vulnerabilities (USN-3235-1)	Nessus	Ubuntu Local Security Checks	2017/3/17	2025/9/3	critical
97015	SUSE SLED12 / SLES12 Security Update : libxml2 (SUSE-SU-2017:0380-1)	Nessus	SuSE Local Security Checks	2017/2/6	2026/1/1	critical
99491	Fedora 25 : libxml2 (2017-a3a47973eb)	Nessus	Fedora Local Security Checks	2017/4/20	2025/12/25	critical
99492	Fedora 24 : libxml2 (2017-be8574d593)	Nessus	Fedora Local Security Checks	2017/4/20	2025/12/25	critical
164572	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-6.1.1)	Nessus	Misc.	2022/9/1	2026/8/15	high
106828	Fedora 26 : libxml2 (2018-a6b59d8f78)	Nessus	Fedora Local Security Checks	2018/2/15	2025/10/29	critical

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