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[R7] LCE 4.8.1 Fixes Multiple Vulnerabilities



The Log Correlation Engine (LCE) is potentially impacted by several vulnerabilities in OpenSSL (20160503), libpcre / PCRE, Libxml2, Handlebars, libcurl, and jQuery that were recently disclosed and fixed. Note that due to the time involved in doing a full analysis of each issue, Tenable has opted to upgrade the included versions of each library as a precaution, and to save time. These vulnerabilities may impact LCE and include:

  • OpenSSL ASN.1 Encoder Negative Zero Value Handling Remote Memory Corruption
  • OpenSSL crypto/evp/encode.c EVP_EncodeUpdate() Function Heap Buffer Overflow Weakness
  • OpenSSL AES-NI CBC MAC Check Padding Oracle MitM Information Disclosure
  • OpenSSL crypto/evp/evp_enc.c EVP_EncryptUpdate() Function Heap Buffer Overflow Weakness
  • OpenSSL crypto/x509/x509_obj.c X509_NAME_oneline() Function ASN1 Strings Handling Out-of-bounds Read Memory Disclosure
  • OpenSSL crypto/asn1/a_d2i_fp.c ASN.1 BIO Length Field Handling Memory Exhaustion Remote DoS
  • Perl-Compatible Regular Expressions (PCRE) pcre_compile.c (*ACCEPT) Verb Handling Buffer Overflow
  • Perl-Compatible Regular Expressions (PCRE) pcretest.c pchars() Function Out-of-bounds Read Weakness
  • Perl-Compatible Regular Expressions (PCRE) pcre_compile.c compile_branch() Function Invalid Pattern Fragment Handling Stack Corruption
  • Perl-Compatible Regular Expressions (PCRE) pcretest.c Out-of-bounds Read Weakness
  • Perl-Compatible Regular Expressions (PCRE) pcre_compile.c pcre_compile2() Function Duplicate Named Group Nested Back Reference Handling Heap Buffer Overflow
  • Libxml2 parser.c xmlParseElementDecl() / xmlParseConditionalSections() Functions Out-of-bounds Read Issue
  • Libxml2 Multiple Functionality Format Strings
  • Libxml2 HTMLparser.c htmlParseNameComplex() Function HTML File Encoding Detection Failure
  • Libxml2 parser.c xmlStringLenDecodeEntities() Function Unspecified XML External Entity (XXE) Injection Issue
  • Libxml2 xmlregexp.c xmlFAParseCharRange() Function Heap Buffer Overflow
  • Libxml2 parser.c xmlParseStartTag2() Function Heap Use-after-free
  • Libxml2 parser.c xmlParseNCNameComplex() Function Heap Use-after-free
  • Libxml2 xmlstring.c xmlStrncatNew() Function Heap Buffer Overflow
  • Libxml2 HTMLparser.c htmlParseSystemLiteral() / htmlParsePubidLiteral() Functions Heap Buffer Overflow
  • Libxml2 xmlsave.c xmlBufAttrSerializeTxtContent() Function Recover Mode XML Content Handling Out-of-bounds Read Issue
  • Libxml2 parser.c Multiple Function Recursive xmlStringDecodeEntities() Call Handling Stack Overflow DoS
  • Libxml2 uri.c xmlParse3986Port() Function Port Argument Handling Integer Overflow Unspecified Issue
  • Libxml2 HTMLparser.c htmlParseName() / htmlParseNameComplex() Functions Out-of-bounds Read Issue
  • Libxml2 parser.c xmlParserEntityCheck() Function Recovery Mode XML Content Parsing Recursion DoS
  • Libxml2 parser.c xmlParseEndTag2() Function Out-of-bounds Read Issue
  • Libxml2 parserInternals.c xmlNextChar() Function Out-of-bounds Read Issue
  • Handlebars lib/handlebars/utils.js Template Unquoted Attributes Improper Escaping XSS Weakness
  • cURL / libcurl lib/multi.c close_all_connections() Function Easy Handle Handling Use-after-free Issue
  • cURL / libcurl lib/vtls/vtls.c TLS Session Resumption Client Certificate Validation Bypass
  • cURL / libcurl lib/vtls/vtls.c Curl_ssl_config_matches() Function TLS Connection Reuse Cross-realm Information Disclosure
  • jQuery Core ajax/script.js Third-party Text Handling XSS

Tenable's Log Correlation Engine (LCE) was found to be impacted by an authenticated stored cross-site scripting (XSS) issue reported to us by Kaustubh Padwad and discovered internally. Tenable thanks him for privately reporting the issue to us.

[R5 Update] LCE was also found to be vulnerable to a second authenticated stored cross-site scripting (XSS) issue found internally by Rich Walchuck and was inadvertently left out of the advisory at publication. This is designated as LCE-4806 / VulnDB 151706 for tracking purposes.

Please note that Tenable strongly recommends that LCE be installed on a subnet that is not Internet addressable.


Tenable has released LCE version 4.8.1 to address the issues above. Download the appropriate installation file to the system hosting LCE, available at the Tenable Support Portal (https://support.tenable.com/support-center/index.php?x=&mod_id=180).

This page contains information regarding security vulnerabilities that may impact Tenable's products. This may include issues specific to our software, or due to the use of third-party libraries within our software. Tenable strongly encourages users to ensure that they upgrade or apply relevant patches in a timely manner.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]