The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.

An update of the apache package has been released.

The version of Tomcat installed on the remote host is prior to 9.0.0.M13. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_9.0.0.m13_security-9 advisory.

  - Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39,     8.5.x before 8.5.7, and 9.x before 9.0.0.M12 if JmxRemoteLifecycleListener is used and an attacker can     reach JMX ports. The issue exists because this listener wasn't updated for consistency with the     CVE-2016-3427 Oracle patch that affected credential types. (CVE-2016-8735)

  - The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite     loop if a header was received that was larger than the available buffer. This made a denial of service     attack possible. (CVE-2016-6817)

  - The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and     6.0.0 to 6.0.47 that parsed the HTTP request line permitted invalid characters. This could be exploited,     in conjunction with a proxy that also permitted the invalid characters but with a different     interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker     could poison a web-cache, perform an XSS attack and/or obtain sensitive information from requests other     then their own. (CVE-2016-6816)

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 Oracle Secure Global Desktop installed on the remote host is 4.71, 5.2, or 5.3 and is missing a security patch from the April 2017 Critical Patch Update (CPU). It is, therefore, affected by multiple vulnerabilities :

  - An integer overflow condition exists in the Window System     (X11) subcomponent in multiple functions in X.Org libExt     due to improper validation of user-supplied input when     calculating the amount of memory required to handle     return data. An unauthenticated, remote attacker can     exploit this to cause a denial of service condition or     the execution of arbitrary code. Note that this issue     only affects version 4.71. (CVE-2013-1982)

  - An integer overflow condition exists in X.Org libXfixes     in the XFixesGetCursorImage() function when handling     large cursor dimensions or name lengths due to improper     validation of user-supplied input. An unauthenticated,     remote attacker can exploit this to cause a denial of     service condition or the execution of arbitrary code.
    (CVE-2013-1983)

  - An integer overflow condition exists within multiple     functions in X.Org libXi due to improper validation of     user-supplied input when calculating the amount of     memory needed to handle return data. An unauthenticated,     remote attacker can exploit this to cause a denial of     service condition or the execution of arbitrary code.
    (CVE-2013-1984)

  - An integer overflow condition exists in X.Org     libXinerama in the XineramaQueryScreens() function due     to improper validation of user-supplied input when     calculating the amount of memory needed to handle return     data. An unauthenticated, remote attacker can exploit     this to cause a denial of service condition or the     execution of arbitrary code. (CVE-2013-1985)

  - An integer overflow condition exists in multiple     functions in X.Org libXrandr due to improper validation     of user-supplied input when calculating the amount of     memory needed to handle return data. An unauthenticated,     remote attacker can exploit this to cause a denial of     service condition or the execution of arbitrary code.
    (CVE-2013-1986)

  - An integer overflow condition exists in multiple     functions in X.Org libXrender due to improper validation     of user-supplied input when calculating the amount of     memory needed to handle return data. An unauthenticated,     remote attacker can exploit this to cause a denial of     service condition or the execution of arbitrary code.
    (CVE-2013-1987)

  - An overflow condition exists in X.Org libXi in the     XListInputDevices() function, related to an unexpected     sign extension, due to improper checking of the amount     of memory needed to handle returned data when converting     smaller integer types to larger ones. An     unauthenticated, remote attacker can exploit this to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2013-1995)

  - An overflow condition exists within multiple functions     in X.Org LibXi due to improper validation of     user-supplied input. An unauthenticated, remote attacker     can exploit this, via a specially crafted length or     index, to cause a denial of service condition or the     execution of arbitrary code. (CVE-2013-1998)

  - An overflow condition exists in X.Org LibXt in the
    _XtResourceConfigurationEH() function due to improper     validation of user-supplied input. An unauthenticated,     remote attacker can exploit this, via a specially     crafted length or index, to cause a denial of service     condition or the execution of arbitrary code.
    (CVE-2013-2002)

  - An integer overflow condition exists in X.Org libXcursor     in the  _XcursorFileHeaderCreate() function due to     improper validation of user-supplied input. An     unauthenticated, remote attacker can exploit this, via     a specially crafted file, to cause a denial of service     condition or the execution of arbitrary code.
    (CVE-2013-2003)

  - An uninitialized pointer flaw exists within multiple     functions in X.Org LibXt due to a failure to check for     proper initialization of pointers. An unauthenticated,     remote attacker can exploit this to corrupt memory,     resulting in a denial of service condition or the     possible execution of arbitrary code. (CVE-2013-2005)

  - A flaw exists in the Application Server subcomponent     (Apache Tomcat) due to a failure to process passwords     when they are paired with non-existent usernames. An     authenticated, remote attacker can exploit this, via a     timing attack, to enumerate user account names.
    (CVE-2016-0762)

  - Multiple integer overflow conditions exist in s3_srvr.c,     ssl_sess.c, and t1_lib.c due to improper use of pointer     arithmetic for heap-buffer boundary checks. An     unauthenticated, remote attacker can exploit these to     cause a denial of service. (CVE-2016-2177)

  - An information disclosure vulnerability exists in the     dsa_sign_setup() function in dsa_ossl.c due to a failure     to properly ensure the use of constant-time operations.
    An unauthenticated, remote attacker can exploit this,     via a timing side-channel attack, to disclose DSA key     information. (CVE-2016-2178)

  - A denial of service vulnerability exists in the DTLS     implementation due to a failure to properly restrict the     lifetime of queue entries associated with unused     out-of-order messages. An unauthenticated, remote     attacker can exploit this, by maintaining multiple     crafted DTLS sessions simultaneously, to exhaust memory.
    (CVE-2016-2179)

  - An out-of-bounds read error exists in the X.509 Public     Key Infrastructure Time-Stamp Protocol (TSP)     implementation. An unauthenticated, remote attacker can     exploit this, via a crafted time-stamp file that is     mishandled by the 'openssl ts' command, to cause a     denial of service or to disclose sensitive information.
    (CVE-2016-2180)

  - A denial of service vulnerability exists in the     Anti-Replay feature in the DTLS implementation due to     improper handling of epoch sequence numbers in records.
    An unauthenticated, remote attacker can exploit this,     via spoofed DTLS records, to cause legitimate packets to     be dropped. (CVE-2016-2181)

  - An overflow condition exists in the BN_bn2dec() function     in bn_print.c due to improper validation of     user-supplied input when handling BIGNUM values. An     unauthenticated, remote attacker can exploit this to     crash the process. (CVE-2016-2182)

  - A vulnerability exists, known as SWEET32, in the 3DES     and Blowfish algorithms due to the use of weak 64-bit     block ciphers by default. A man-in-the-middle attacker     who has sufficient resources can exploit this     vulnerability, via a 'birthday' attack, to detect a     collision that leaks the XOR between the fixed secret     and a known plaintext, allowing the disclosure of the     secret text, such as secure HTTPS cookies, and possibly     resulting in the hijacking of an authenticated session.
    (CVE-2016-2183)

  - A flaw exists in the Core subcomponent, specifically in     the libcurl library, due to improper validation of TLS     certificates. An authenticated, remote attacker with the     ability to intercept network traffic can exploit this     issue to disclose or manipulate transmitted data by     spoofing the TLS/SSL server using a certificate that     appears valid. Note that this issue only affects     versions 5.2 and 5.3. (CVE-2016-3739)

  - A flaw exists in cURL and libcurl when loading dynamic     link library (DLL) files security.dll, secur32.dll, or     ws2_32.dll due searching an insecure path which may not     be trusted or under user control. A local attacker can     exploit this, via a Trojan DLL file placed in the search     path, to execute arbitrary code with the privileges of     the user running the program. (CVE-2016-4802)

  - A security bypass vulnerability exists in Apache Tomcat     due to an unspecified flaw related to web applications.
    A local attacker can exploit this, via a utility method     that is available to web applications, to bypass a     configured SecurityManager. (CVE-2016-5018)

  - An out-of-bounds access error exists in the Window     System (X11) subcomponent, specifically in the     XvQueryAdaptors() function in file Xv.c, when handling     server responses. An authenticated, remote attacker can     exploit this to impact confidentiality, integrity, and     availability. (CVE-2016-5407)

  - A use-after-free error exists in cURL and libcurl within     file lib/vtls/vtls.c due to the program attempting to     resume TLS sessions even if the client certificate     fails. An unauthenticated, remote attacker can exploit     this to bypass validation mechanisms, allowing the     attacker to possibly control which connection is used.
    (CVE-2016-5419)

  - A flaw exists in cURL and libcurl in the     Curl_ssl_config_matches() function within file     lib/vtls/vtls.c due to the program reusing TLS     connections with different client certificates. An     unauthenticated, remote attacker can exploit this to     disclose sensitive cross-realm information.
    (CVE-2016-5420)

  - A use-after-free error exists in cURL and libcurl in     in the close_all_connections() function within file     lib/multi.c due to connection pointers not being     properly cleared. An unauthenticated, remote attacker     can exploit this to have an unspecified impact on     confidentiality, integrity, and availability.
    (CVE-2016-5421)

  - A flaw exists in the tls_decrypt_ticket() function     in t1_lib.c due to improper handling of ticket HMAC     digests. An unauthenticated, remote attacker can exploit     this, via a ticket that is too short, to crash the     process, resulting in a denial of service.
    (CVE-2016-6302)

  - An integer overflow condition exists in the     MDC2_Update() function in mdc2dgst.c due to improper     validation of user-supplied input. An unauthenticated,     remote attacker can exploit this to cause a heap-based     buffer overflow, resulting in a denial of service     condition or possibly the execution of arbitrary code.
    (CVE-2016-6303)

  - A flaw exists in the ssl_parse_clienthello_tlsext()     function in t1_lib.c due to improper handling of overly     large OCSP Status Request extensions from clients. An     unauthenticated, remote attacker can exploit this, via     large OCSP Status Request extensions, to exhaust memory     resources, resulting in a denial of service condition.
    (CVE-2016-6304)

  - A flaw exists in the SSL_peek() function in     rec_layer_s3.c due to improper handling of empty     records. An unauthenticated, remote attacker can exploit     this, by triggering a zero-length record in an SSL_peek     call, to cause an infinite loop, resulting in a denial     of service condition. (CVE-2016-6305)

  - An out-of-bounds read error exists in the certificate     parser that allows an unauthenticated, remote attacker     to cause a denial of service via crafted certificate     operations. (CVE-2016-6306)

  - A denial of service vulnerability exists in the     state-machine implementation due to a failure to check     for an excessive length before allocating memory. An     unauthenticated, remote attacker can exploit this, via a     crafted TLS message, to exhaust memory resources.
    (CVE-2016-6307)

  - A denial of service vulnerability exists in the DTLS     implementation due to improper handling of excessively     long DTLS messages. An unauthenticated, remote attacker     can exploit this, via a crafted DTLS message, to exhaust     available memory resources. (CVE-2016-6308)

  - A flaw exists in Apache Tomcat within SecurityManager     due to improper restriction of access to system     properties by the configuration files system property     replacement feature. A local attacker can exploit this,     via a crafted web application, to bypass SecurityManager     restrictions and disclose system properties.
    (CVE-2016-6794)

  - A flaw exists in Apache Tomcat that allows a local     attacker to bypass a configured SecurityManager by     changing the configuration parameters for the JSP     Servlet. (CVE-2016-6796)

  - A flaw exists in Apache Tomcat due to a failure to limit     web application access to global JNDI resources. A local     attacker can exploit this to gain unauthorized access to     resources. (CVE-2016-6797)

  - A flaw exists in Apache Tomcat when handling request     lines containing certain invalid characters. An     unauthenticated, remote attacker can exploit this to     conduct HTTP response splitting attacks by injecting     additional headers into responses. (CVE-2016-6816)

  - An infinite loop condition exists in Apache Tomcat in     the HTTP/2 parser when handling overly large headers. An     unauthenticated, remote attacker can exploit this, via a     specially crafted request, to cause a denial of service     condition. (CVE-2016-6817)

  - A carry propagation error exists in the     Broadwell-specific Montgomery multiplication procedure     when handling input lengths divisible by but longer than     256 bits. This can result in transient authentication     and key negotiation failures or reproducible erroneous     outcomes of public-key operations with specially crafted     input. A man-in-the-middle attacker can possibly exploit     this issue to compromise ECDH key negotiations that     utilize Brainpool P-512 curves. (CVE-2016-7055)

  - A flaw exists in cURL in the Curl_cookie_init() function     within file lib/cookie.c when handling cookies. An     unauthenticated, remote attacker can exploit this to     inject new cookies for arbitrary domains.
    (CVE-2016-8615)

  - A flaw exists in cURL in the ConnectionExists() function     within file lib/url.c when checking credentials supplied     for reused connections due to the comparison being     case-insensitive. An unauthenticated, remote attacker     can exploit this to authenticate without knowing the     proper case of the username and password.
    (CVE-2016-8616)

  - An integer overflow condition exists in cURL in the     base64_encode() function within file lib/base64.c due to     improper validation of certain input. An     unauthenticated, remote attacker can exploit this to     cause a denial of service condition or the execution of     arbitrary code. (CVE-2016-8617)

  - A denial of service vulnerability exists in cURL in the     alloc_addbyter() function within file lib/mprintf.c due     to improper validation of overly long input when it is     supplied to the curl_maprintf() API method. An     unauthenticated, remote attacker can exploit this to     free already freed memory and thereby crash the program.
    (CVE-2016-8618)

  - A double-free error exists in cURL in the read_data()     function within file lib/security.c when handling     Kerberos authentication. An unauthenticated, remote     attacker can exploit this to free already freed memory,     resulting in an unspecified impact on confidentiality,     integrity, and availability. (CVE-2016-8619)

  - An out-of-bounds access error exists in cURL in file     tool_urlglob.c within the globbing feature. An     unauthenticated, remote attacker can exploit this to     disclose memory contents or execute arbitrary code.
    (CVE-2016-8620)

  - An out-of-bounds error exists in cURL in the parsedate()     function within file lib/parsedate.c when handling     dates. An unauthenticated, remote attacker can exploit     this to disclose memory contents or cause a denial of     service condition. (CVE-2016-8621)

  - An integer truncation error exists in cURL in the     curl_easy_unescape() function within file lib/escape.c     when handling overly large URLs. An unauthenticated,     remote attacker can exploit this to cause a denial of     service condition or the execution of arbitrary code.
    (CVE-2016-8622)

  - A use-after-free error exists in cURL within file     lib/cookie.c when handling shared cookies. An     unauthenticated, remote attacker can exploit this to     disclose memory contents. (CVE-2016-8623)

  - A flaw exists in cURL in the parseurlandfillconn()     function within file lib/url.c when parsing the     authority component of a URL with the host name part     ending in a '#' character. An unauthenticated, remote     attacker can exploit this to establish a connection to     a different host than intended. (CVE-2016-8624)

  - A flaw exists in cURL within International Domain Names     (IDNA) handling when translating domain names to puny     code for DNS resolving due to using the outdated IDNA     2003 standard instead of the IDNA 2008 standard, which     can result in incorrect translation of a domain name.
    An unauthenticated, remote attacker can exploit this to     cause network traffic to be redirected to a different     host than intended. (CVE-2016-8625)

  - A flaw exists in Apache Tomcat within the     catalina/mbeans/JmxRemoteLifecycleListener.java class     that is triggered during the deserialization of Java     objects. An unauthenticated, remote attacker can exploit     this to execute arbitrary code. (CVE-2016-8735)

  - A flaw exists in the Web Server component (Apache HTTP     Server) when handling whitespace patterns in User-Agent     headers. An authenticated, remote attacker can exploit     this, via a specially crafted User-Agent header, to     cause incorrect processing of sequences of requests,     resulting in incorrectly interpreting responses,     polluting the cache, or disclosing content from one     request to a second downstream user-agent.
    (CVE-2016-8743)

  - A NULL pointer dereference flaw exists within file     ssl/statem/statem_clnt.c when handling parameters for     the DHE or ECDHE key exchanges. An unauthenticated,     remote attacker can exploit this, via specially crafted     parameters, to cause a denial of service condition.
    (CVE-2017-3730)

  - A out-of-bounds read error exists exists in the Core     subcomponent, specifically in OpenSSL, when handling     packets using the CHACHA20/POLY1305 or RC4-MD5 ciphers.
    An unauthenticated, remote attacker can exploit this,     via specially crafted truncated packets, to cause a     denial of service condition. (CVE-2017-3731)

  - A carry propagating error exists in the x86_64     Montgomery squaring implementation that may cause the     BN_mod_exp() function to produce incorrect results. An     unauthenticated, remote attacker with sufficient     resources can exploit this to obtain sensitive     information regarding private keys. Note that this issue     is very similar to CVE-2015-3193. Moreover, the attacker     would additionally need online access to an unpatched     system using the target private key in a scenario with     persistent DH parameters and a private key that is     shared between multiple clients. For example, this can     occur by default in OpenSSL DHE based SSL/TLS cipher     suites. (CVE-2017-3732)

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

This updates includes a rebase from tomcat 8.0.38 up to 8.0.39 which resolves multiple CVEs :

  - \#1397493 - CVE-2016-6816 CVE-2016-6817 CVE-2016-8735     tomcat: various flaws

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 Tomcat installed on the remote host is prior to 8.5.8. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_8.5.8_security-8 advisory.

  - Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39,     8.5.x before 8.5.7, and 9.x before 9.0.0.M12 if JmxRemoteLifecycleListener is used and an attacker can     reach JMX ports. The issue exists because this listener wasn't updated for consistency with the     CVE-2016-3427 Oracle patch that affected credential types. (CVE-2016-8735)

  - The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite     loop if a header was received that was larger than the available buffer. This made a denial of service     attack possible. (CVE-2016-6817)

  - The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and     6.0.0 to 6.0.47 that parsed the HTTP request line permitted invalid characters. This could be exploited,     in conjunction with a proxy that also permitted the invalid characters but with a different     interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker     could poison a web-cache, perform an XSS attack and/or obtain sensitive information from requests other     then their own. (CVE-2016-6816)

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	Severity
203069	Photon OS 1.0: Apache PHSA-2016-0011	Nessus	PhotonOS Local Security Checks	high
197841	Apache Tomcat 9.0.0.M1 < 9.0.0.M13 multiple vulnerabilities	Nessus	Web Servers	critical
99930	Oracle Secure Global Desktop Multiple Vulnerabilities (April 2017 CPU) (SWEET32)	Nessus	Misc.	critical
95904	Fedora 24 : 1:tomcat (2016-a98c560116)	Nessus	Fedora Local Security Checks	critical
95830	Fedora 23 : 1:tomcat (2016-9c33466fbb)	Nessus	Fedora Local Security Checks	critical
95829	Fedora 25 : 1:tomcat (2016-98cca07999)	Nessus	Fedora Local Security Checks	critical
95438	Apache Tomcat 8.5.0 < 8.5.8 multiple vulnerabilities	Nessus	Web Servers	critical

Detections

Analytics

CVE-2016-6817

high

Tenable Plugins

high

critical

critical

critical

critical

critical

critical