parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3739-1 advisory.

  - libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag     directly indicating that the current document may be read but other files may not be opened, which makes     it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.
    (CVE-2016-9318)

  - parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.
    (CVE-2017-16932)

  - The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of     service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict     memory usage to what is required for a legitimate file. (CVE-2017-18258)

  - A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2     through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case.
    Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable     to a denial of service attack due to a crash of the application. (CVE-2018-14404)

  - libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite     loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different     vulnerability than CVE-2015-8035 and CVE-2018-9251. (CVE-2018-14567)

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

According to its self-reported version, the Nessus Network Monitor running on the remote host is prior to 6.2.2. It is, therefore, affected by multiple vulnerabilities as referenced in the TNS-2023-23 advisory. Several of the third-party components were found to contain vulnerabilities, and updated versions have been made available by the providers. Out of caution and in line with best practice, Tenable has opted to upgrade these components to address the potential impact of the issues. Nessus Network Monitor 6.2.2 updates the following components:

  - c-ares from version 1.10.0 to version 1.19.1.
  - curl from version 7.79.1 to version 8.1.2.
  - libbzip2 from version 1.0.6 to version 1.0.8.
  - libpcre from version 8.42 to version 8.44.
  - libxml2 from version 2.7.7 to version 2.11.1.
  - libxslt from version 1.1.26 to version 1.1.37.
  - libxmlsec from version 1.2.18 to version 1.2.37.
  - sqlite from version 3.27.2 to version 3.40.1.
  - jQuery Cookie from version 1.3.1 to version 1.4.1.
  - jQuery UI from version 1.13.0 to version 1.13.2.
  - OpenSSL from version 3.0.8 to version 3.0.9.

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:1833-1 advisory.

  - parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.
    (CVE-2017-16932)

  - In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*)     don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a     victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for     example libxslt through 1.1.35, is affected as well. (CVE-2022-29824)

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

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2972 advisory.

  - libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag     directly indicating that the current document may be read but other files may not be opened, which makes     it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.
    (CVE-2016-9318)

  - parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.
    (CVE-2017-16932)

  - An integer overflow in xmlmemory.c in libxml2 before 2.9.5, as used in Google Chrome prior to 62.0.3202.62     and other products, allowed a remote attacker to potentially exploit heap corruption via a crafted XML     file. (CVE-2017-5130)

  - ** DISPUTED ** libxml2 2.9.4, when used in recover mode, allows remote attackers to cause a denial of     service (NULL pointer dereference) via a crafted XML document. NOTE: The maintainer states I would     disagree of a CVE with the Recover parsing option which should only be used for manual recovery at least     for XML parser. (CVE-2017-5969)

  - valid.c in libxml2 before 2.9.13 has a use-after-free of ID and IDREF attributes. (CVE-2022-23308)

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 libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A remote code execution vulnerability in libxml2 could     enable an attacker using a specially crafted file to     execute arbitrary code within the context of an     unprivileged process. This issue is rated as High due     to the possibility of remote code execution in an     application that uses this library. Product: Android.
    Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1,     7.1.2. Android ID: A-37104170.(CVE-2017-0663)

  - parser.c in libxml2 before 2.9.5 mishandles     parameter-entity references because the NEXTL macro     calls the xmlParserHandlePEReference function in the     case of a '%' character in a DTD name.(CVE-2017-16931)

  - parser.c in libxml2 before 2.9.5 does not prevent     infinite recursion in parameter     entities.(CVE-2017-16932)

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 its version, the ClamAV clamd antivirus daemon running on the remote host is prior to 0.100.1. It is, therefore, affected by multiple vulnerabilities.

Joel Esler reports :

3 security fixes in this release :

- CVE-2017-16932: Vulnerability in libxml2 dependency (affects ClamAV on Windows only).

- CVE-2018-0360: HWP integer overflow, infinite loop vulnerability.
Reported by Secunia Research at Flexera.

- CVE-2018-0361: ClamAV PDF object length check, unreasonably long time to parse relatively small file. Report ed by aCaB.

According to the versions of the libxml2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Use-after-free vulnerability in libxml2 through 2.9.4,     as used in Google Chrome before 52.0.2743.82, allows     remote attackers to cause a denial of service or     possibly have unspecified other impact via vectors     related to the XPointer range-to     function.(CVE-2016-5131)

  - parser.c in libxml2 before 2.9.5 mishandles     parameter-entity references because the NEXTL macro     calls the xmlParserHandlePEReference function in the     case of a '%' character in a DTD name.(CVE-2017-16931)

  - parser.c in libxml2 before 2.9.5 does not prevent     infinite recursion in parameter     entities.)CVE-2017-16932)

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 libxml2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Use-after-free vulnerability in libxml2 through 2.9.4,     as used in Google Chrome before 52.0.2743.82, allows     remote attackers to cause a denial of service or     possibly have unspecified other impact via vectors     related to the XPointer range-to     function.(CVE-2016-5131)

  - parser.c in libxml2 before 2.9.5 mishandles     parameter-entity references because the NEXTL macro     calls the xmlParserHandlePEReference function in the     case of a '%' character in a DTD name.(CVE-2017-16931)

  - parser.c in libxml2 before 2.9.5 does not prevent     infinite recursion in parameter     entities.)CVE-2017-16932)

  - A flaw in libxml2 allows remote XML entity inclusion     with default parser flags (i.e., when the caller did     not request entity substitution, DTD validation,     external DTD subset loading, or default DTD     attributes). Depending on the context, this may expose     a higher-risk attack surface in libxml2 not usually     reachable with default parser flags, and expose content     from local files, HTTP, or FTP servers (which might be     otherwise unreachable).(CVE-2017-7375)

  - Buffer overflow in libxml2 allows remote attackers to     execute arbitrary code by leveraging an incorrect limit     for port values when handling redirects.(CVE-2017-7376)

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.

This update for libxml2 fixes several issues. Theses security issues were fixed :

  - CVE-2017-16932: Fixed infinite recursion could lead to     an infinite loop or memory exhaustion when expanding a     parameter entity in a DTD (bsc#1069689).

  - CVE-2017-15412: Prevent use after free when calling     XPath extension functions that allowed remote attackers     to cause DoS or potentially RCE (bsc#1077993)

  - CVE-2016-5131: Use-after-free vulnerability in libxml2     allowed remote attackers to cause a denial of service or     possibly have unspecified other impact via vectors     related to the XPointer range-to function. (bsc#1078813)

  - CVE-2017-5130: Fixed a potential remote buffer overflow     in function xmlMemoryStrdup() (bsc#1078806)

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.

Wei Lei discovered that libxml2 incorrecty handled certain parameter entities. An attacker could use this issue with specially constructed XML data to cause libxml2 to consume resources, leading to a denial of service.

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

CVE-2017-16931 parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.

CVE-2017-16932 parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.

For Debian 7 'Wheezy', these problems have been fixed in version 2.8.0+dfsg1-7+wheezy11.

We recommend that you upgrade your libxml2 packages.

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

ID	Name	Product	Family	Severity
183608	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : libxml2 vulnerabilities (USN-3739-1)	Nessus	Ubuntu Local Security Checks	medium
177842	Nessus Network Monitor < 6.2.2 Multiple Vulnerabilities (TNS-2023-23)	Nessus	Misc.	critical
161498	SUSE SLES12 Security Update : libxml2 (SUSE-SU-2022:1833-1)	Nessus	SuSE Local Security Checks	high
159615	Debian DLA-2972-1 : libxml2 - LTS security update	Nessus	Debian Local Security Checks	high
117567	EulerOS Virtualization 2.5.0 : libxml2 (EulerOS-SA-2018-1258)	Nessus	Huawei Local Security Checks	critical
117566	EulerOS Virtualization 2.5.1 : libxml2 (EulerOS-SA-2018-1257)	Nessus	Huawei Local Security Checks	critical
111517	ClamAV < 0.100.1 Multiple Vulnerabilities	Nessus	Misc.	high
110970	FreeBSD : clamav -- multiple vulnerabilities (d1e9d8c5-839b-11e8-9610-9c5c8e75236a)	Nessus	FreeBSD Local Security Checks	high
110732	EulerOS 2.0 SP3 : libxml2 (EulerOS-SA-2018-1156)	Nessus	Huawei Local Security Checks	critical
109487	EulerOS 2.0 SP2 : libxml2 (EulerOS-SA-2018-1089)	Nessus	Huawei Local Security Checks	critical
109486	EulerOS 2.0 SP1 : libxml2 (EulerOS-SA-2018-1088)	Nessus	Huawei Local Security Checks	critical
106707	SUSE SLES11 Security Update : libxml2 (SUSE-SU-2018:0395-1)	Nessus	SuSE Local Security Checks	high
105037	Ubuntu 14.04 LTS / 16.04 LTS : libxml2 vulnerability (USN-3504-1)	Nessus	Ubuntu Local Security Checks	high
104936	Debian DLA-1194-1 : libxml2 security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2017-16932

high

Tenable Plugins

medium

critical

high

high

critical

critical

high

high

critical

critical

critical

high

high

critical