org/apache/tomcat/util/net/NioEndpoint.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.28, when the NIO connector is used in conjunction with sendfile and HTTPS, allows remote attackers to cause a denial of service (infinite loop) by terminating the connection during the reading of a response.

The remote Solaris system is missing necessary patches to address security updates :

  - java/org/apache/coyote/http11/InternalNioInputBuffer.jav     a in the HTTP NIO connector in Apache Tomcat 6.x before     6.0.36 and 7.x before 7.0.28 does not properly restrict     the request-header size, which allows remote attackers     to cause a denial of service (memory consumption) via a     large amount of header data. (CVE-2012-2733)

  - org/apache/catalina/realm/RealmBase.java in Apache     Tomcat 6.x before 6.0.36 and 7.x before 7.0.30, when     FORM authentication is used, allows remote attackers to     bypass security-constraint checks by leveraging a     previous setUserPrincipal call and then placing     /j_security_check at the end of a URI. (CVE-2012-3546)

  - org/apache/catalina/filters/CsrfPreventionFilter.java in     Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.32     allows remote attackers to bypass the cross-site request     forgery (CSRF) protection mechanism via a request that     lacks a session identifier. (CVE-2012-4431)

  - org/apache/tomcat/util/net/NioEndpoint.java in Apache     Tomcat 6.x before 6.0.36 and 7.x before 7.0.28, when the     NIO connector is used in conjunction with sendfile and     HTTPS, allows remote attackers to cause a denial of     service (infinite loop) by terminating the connection     during the reading of a response. (CVE-2012-4534)

  - The replay-countermeasure functionality in the HTTP     Digest Access Authentication implementation in Apache     Tomcat 5.5.x before 5.5.36, 6.x before 6.0.36, and 7.x     before 7.0.30 tracks cnonce (aka client nonce) values     instead of nonce (aka server nonce) and nc (aka     nonce-count) values, which makes it easier for remote     attackers to bypass intended access restrictions by     sniffing the network for valid requests, a different     vulnerability than CVE-2011-1184. (CVE-2012-5885)

  - The HTTP Digest Access Authentication implementation in     Apache Tomcat 5.5.x before 5.5.36, 6.x before 6.0.36,     and 7.x before 7.0.30 caches information about the     authenticated user within the session state, which makes     it easier for remote attackers to bypass authentication     via vectors related to the session ID. (CVE-2012-5886)

  - The HTTP Digest Access Authentication implementation in     Apache Tomcat 5.5.x before 5.5.36, 6.x before 6.0.36,     and 7.x before 7.0.30 does not properly check for stale     nonce values in conjunction with enforcement of proper     credentials, which makes it easier for remote attackers     to bypass intended access restrictions by sniffing the     network for valid requests. (CVE-2012-5887)

The remote host is affected by the vulnerability described in GLSA-201412-29 (Apache Tomcat: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Tomcat. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote attacker may be able to cause a Denial of Service condition as       well as obtain sensitive information, bypass protection mechanisms and       authentication restrictions.
  Workaround :

    There is no known workaround at this time.

Updated tomcat6 packages that fix multiple security issues are now available for JBoss Enterprise Web Server 2.0.0 for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Apache Tomcat is a servlet container.

It was found that sending a request without a session identifier to a protected resource could bypass the Cross-Site Request Forgery (CSRF) prevention filter. A remote attacker could use this flaw to perform CSRF attacks against applications that rely on the CSRF prevention filter and do not contain internal mitigation for CSRF.
(CVE-2012-4431)

A flaw was found in the way Tomcat handled sendfile operations when using the HTTP NIO (Non-Blocking I/O) connector and HTTPS. A remote attacker could use this flaw to cause a denial of service (infinite loop). The HTTP NIO connector is used by default in JBoss Enterprise Web Server. The Apache Portable Runtime (APR) connector from the Tomcat Native library was not affected by this flaw. (CVE-2012-4534)

Multiple weaknesses were found in the Tomcat DIGEST authentication implementation, effectively reducing the security normally provided by DIGEST authentication. A remote attacker could use these flaws to perform replay attacks in some circumstances. (CVE-2012-5885, CVE-2012-5886, CVE-2012-5887)

A denial of service flaw was found in the way the Tomcat HTTP NIO connector enforced limits on the permitted size of request headers. A remote attacker could use this flaw to trigger an OutOfMemoryError by sending a specially crafted request with very large headers. The HTTP NIO connector is used by default in JBoss Enterprise Web Server. The APR connector from the Tomcat Native library was not affected by this flaw. (CVE-2012-2733)

Warning: Before applying the update, back up your existing JBoss Enterprise Web Server installation (including all applications and configuration files).

Users of Tomcat should upgrade to these updated packages, which resolve these issues. Tomcat must be restarted for this update to take effect.

- fix bnc#794548 - denial of service (CVE-2012-4534)

  - tomcat-CVE-2012-4534.patch fixes apache#53138,     apache#52858     http://svn.apache.org/viewvc?view=rev&rev=1340218

- fix bnc#794548 - denial of service (CVE-2012-4534)

  - apache-tomcat-CVE-2012-4534.patch fixes apache#53138,     apache#52858     http://svn.apache.org/viewvc?view=rev&rev=1372035

  - fix a minor issue in apache-tomcat-CVE-2012-4431.patch     use the already initialized session variable instead of     an another call req.getSesssion()

From Red Hat Security Advisory 2013:0623 :

Updated tomcat6 packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Apache Tomcat is a servlet container.

It was found that when an application used FORM authentication, along with another component that calls request.setUserPrincipal() before the call to FormAuthenticator#authenticate() (such as the Single-Sign-On valve), it was possible to bypass the security constraint checks in the FORM authenticator by appending '/j_security_check' to the end of a URL. A remote attacker with an authenticated session on an affected application could use this flaw to circumvent authorization controls, and thereby access resources not permitted by the roles associated with their authenticated session.
(CVE-2012-3546)

A flaw was found in the way Tomcat handled sendfile operations when using the HTTP NIO (Non-Blocking I/O) connector and HTTPS. A remote attacker could use this flaw to cause a denial of service (infinite loop). The HTTP blocking IO (BIO) connector, which is not vulnerable to this issue, is used by default in Red Hat Enterprise Linux 6.
(CVE-2012-4534)

Multiple weaknesses were found in the Tomcat DIGEST authentication implementation, effectively reducing the security normally provided by DIGEST authentication. A remote attacker could use these flaws to perform replay attacks in some circumstances. (CVE-2012-5885, CVE-2012-5886, CVE-2012-5887)

Users of Tomcat should upgrade to these updated packages, which correct these issues. Tomcat must be restarted for this update to take effect.

The version of VMware vCenter installed on the remote host is 5.1 prior to update 1.  It therefore is potentially affected by the following vulnerabilities :

  - When deployed in an environment that uses Active     Directory with anonymous LDAP binding enabled, VMware     vCenter doesn't properly handle login credentials.
    (CVE-2013-3107)

  - The bundled version of Oracle JRE is earlier than     1.6.0_37 and thus, is affected by multiple security     issues.

  - The bundled version of Apache Tomcat is affected by     multiple issues. (CVE-2012-2733, CVE-2012-4534)

It was found that when an application used FORM authentication, along with another component that calls request.setUserPrincipal() before the call to FormAuthenticator#authenticate() (such as the Single-Sign-On valve), it was possible to bypass the security constraint checks in the FORM authenticator by appending '/j_security_check' to the end of a URL. A remote attacker with an authenticated session on an affected application could use this flaw to circumvent authorization controls, and thereby access resources not permitted by the roles associated with their authenticated session.
(CVE-2012-3546)

A flaw was found in the way Tomcat handled sendfile operations when using the HTTP NIO (Non-Blocking I/O) connector and HTTPS. A remote attacker could use this flaw to cause a denial of service (infinite loop). The HTTP blocking IO (BIO) connector, which is not vulnerable to this issue, is used by default in Scientific Linux 6.
(CVE-2012-4534)

Multiple weaknesses were found in the Tomcat DIGEST authentication implementation, effectively reducing the security normally provided by DIGEST authentication. A remote attacker could use these flaws to perform replay attacks in some circumstances. (CVE-2012-5885, CVE-2012-5886, CVE-2012-5887)

Tomcat must be restarted for this update to take effect.

Updated tomcat6 packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Apache Tomcat is a servlet container.

It was found that when an application used FORM authentication, along with another component that calls request.setUserPrincipal() before the call to FormAuthenticator#authenticate() (such as the Single-Sign-On valve), it was possible to bypass the security constraint checks in the FORM authenticator by appending '/j_security_check' to the end of a URL. A remote attacker with an authenticated session on an affected application could use this flaw to circumvent authorization controls, and thereby access resources not permitted by the roles associated with their authenticated session.
(CVE-2012-3546)

A flaw was found in the way Tomcat handled sendfile operations when using the HTTP NIO (Non-Blocking I/O) connector and HTTPS. A remote attacker could use this flaw to cause a denial of service (infinite loop). The HTTP blocking IO (BIO) connector, which is not vulnerable to this issue, is used by default in Red Hat Enterprise Linux 6.
(CVE-2012-4534)

Multiple weaknesses were found in the Tomcat DIGEST authentication implementation, effectively reducing the security normally provided by DIGEST authentication. A remote attacker could use these flaws to perform replay attacks in some circumstances. (CVE-2012-5885, CVE-2012-5886, CVE-2012-5887)

Users of Tomcat should upgrade to these updated packages, which correct these issues. Tomcat must be restarted for this update to take effect.

This update of tomcat6 fixes the following security issues :

  - denial of service. (CVE-2012-4534)

  - tomcat: HTTP NIO connector OOM DoS via a request with     large headers. (CVE-2012-2733)

  - tomcat: cnonce tracking weakness. (CVE-2012-5885)

  - tomcat: authentication caching weakness. (CVE-2012-5886)

  - tomcat: stale nonce weakness. (CVE-2012-5887)

  - tomcat: affected by slowloris DoS. (CVE-2012-5568)

  - tomcat: Bypass of security constraints. (CVE-2012-3546)

  - tomcat: bypass of CSRF prevention filter.
    (CVE-2012-4431)

It was discovered that Tomcat incorrectly performed certain security constraint checks in the FORM authenticator. A remote attacker could possibly use this flaw with a specially crafted URI to bypass security constraint checks. This issue only affected Ubuntu 10.04 LTS, Ubuntu 11.10 and Ubuntu 12.04 LTS. (CVE-2012-3546)

It was discovered that Tomcat incorrectly handled requests that lack a session identifier. A remote attacker could possibly use this flaw to bypass the cross-site request forgery protection. (CVE-2012-4431)

It was discovered that Tomcat incorrectly handled sendfile and HTTPS when the NIO connector is used. A remote attacker could use this flaw to cause Tomcat to stop responsing, resulting in a denial of service.
This issue only affected Ubuntu 10.04 LTS, Ubuntu 11.10 and Ubuntu 12.04 LTS. (CVE-2012-4534).

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.

The Apache Software Foundation reports :

When using the NIO connector with sendfile and HTTPS enabled, if a client breaks the connection while reading the response an infinite loop is entered leading to a denial of service.

- Updated to 7.0.33

    - Resolves: rhbz 873620 need chkconfig for       update-alternatives

    - Resolves: rhbz 883676,883691,883704,873707 fix several       security issues

    - Resolves: rhbz 883806 refix logdir ownership

    - Resolves: rhbz 820119 Remove bundled       apache-commons-dbcp

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

Versions of Tomcat 7.0.x earlier than 7.0.28 are potentially affected by a remote denial of service vulnerability:

  - A flaw exists within the parseHeaders() function that could allow for a crafted header to cause a remote denial of service (CVE-2012-2733)

  - An error exists related to the 'NIO' connector when HTTPS and 'sendfile' are enabled that can force the application into an infinite loop. (CVE-2012-4534)

Versions earlier than  Apache Tomcat 6.0.36 are potentially affected by multiple vulnerabilities :

  - A flaw exists within the parseHeaders() function that could allow for a crafted header to cause a remote denial of service. (CVE-2012-2733)

  - An error exists related to FORM authentication that can allow security bypass if 'j_security_check' is appended to the request. (CVE-2012-3546)

  - An error exists in the file 'filters/CsrfPreventionFilter.java' that can allow cross-site request forgery (CSRF) attacks to bypass the filtering. This can allow access to protected resources without a session identifier. (CVE-2012-4431)

  - An error exists related to the 'NIO' connector when HTTPS and 'sendfile' are enabled that can force the application into an infinite loop. (CVE-2012-4534)

  - Replay-countermeasure functionality in HTTP Digest  Access Authentication tracks cnonce values instead of nonce values, which makes it easier for attackers to bypass access restrictions by sniffing the network for valid requests. (CVE-2012-5885)

  - HTTP Digest Access Authentication implementation caches information about the authenticated user, which could potentially allow an attacker to bypass authentication via session ID. (CVE-2012-5886)

  - HTTP Digest Access Authentication implementation does not properly check for stale nonce values with enforcement of proper credentials, which allows an attacker to bypass restrictions by sniffing requests. (CVE-2012-5887)

According to its self-reported version number, the instance of Apache Tomcat 6.0 listening on the remote host is prior to Tomcat 6.0.36. It is, therefore, affected by multiple vulnerabilities :

  - A flaw exists within the parseHeaders() function that     allows for a crafted header to cause a remote denial of     service. (CVE-2012-2733)

  - An error exists related to FORM authentication that     allows a security bypass if 'j_security_check' is     appended to the request. (CVE-2012-3546)

  - An error exists in the file     'filters/CsrfPreventionFilter.java' that allows     cross-site request forgery (XSRF) attacks to bypass     the filtering. This can allow access to protected     resources without a session identifier. (CVE-2012-4431)

  - An error exists related to the 'NIO' connector when     HTTPS and 'sendfile' are enabled that can force the     application into an infinite loop. (CVE-2012-4534)

  - Replay-countermeasure functionality in HTTP Digest     Access Authentication tracks cnonce values instead of     nonce values, which makes it easier for attackers to     bypass access restrictions by sniffing the network for     valid requests. (CVE-2012-5885)

  - The HTTP Digest Access Authentication implementation     caches information about the authenticated user, which     allows an attacker to bypass authentication via session     ID. (CVE-2012-5886)

  - The HTTP Digest Access Authentication implementation     does not properly check for stale nonce values with     enforcement of proper credentials, which allows an     attacker to bypass restrictions by sniffing requests.
    (CVE-2012-5887)

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 Tomcat installed on the remote host is prior to 7.0.28. It is, therefore, affected by multiple vulnerabilities as referenced in the fixed_in_apache_tomcat_7.0.28_security-7 advisory.

  - java/org/apache/coyote/http11/InternalNioInputBuffer.java in the HTTP NIO connector in Apache Tomcat 6.x     before 6.0.36 and 7.x before 7.0.28 does not properly restrict the request-header size, which allows     remote attackers to cause a denial of service (memory consumption) via a large amount of header data.
    (CVE-2012-2733)

  - org/apache/tomcat/util/net/NioEndpoint.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.28, when     the NIO connector is used in conjunction with sendfile and HTTPS, allows remote attackers to cause a     denial of service (infinite loop) by terminating the connection during the reading of a response.
    (CVE-2012-4534)

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
80791	Oracle Solaris Third-Party Patch Update : tomcat (multiple_vulnerabilities_in_apache_tomcat3)	Nessus	Solaris Local Security Checks	medium
79982	GLSA-201412-29 : Apache Tomcat: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
76234	RHEL 5 / 6 : JBoss Web Server (RHSA-2013:0266)	Nessus	Red Hat Local Security Checks	medium
74942	openSUSE Security Update : tomcat (openSUSE-SU-2013:0170-1)	Nessus	SuSE Local Security Checks	low
74938	openSUSE Security Update : tomcat6 (openSUSE-SU-2013:0161-1)	Nessus	SuSE Local Security Checks	medium
68786	Oracle Linux 6 : tomcat6 (ELSA-2013-0623)	Nessus	Oracle Linux Local Security Checks	medium
66274	VMware Security Updates for vCenter Server (VMSA-2013-0006)	Nessus	Misc.	medium
65243	Scientific Linux Security Update : tomcat6 on SL6.x (noarch) (20130311)	Nessus	Scientific Linux Local Security Checks	medium
65225	CentOS 6 : tomcat6 (CESA-2013:0623)	Nessus	CentOS Local Security Checks	medium
65201	RHEL 6 : tomcat6 (RHSA-2013:0623)	Nessus	Red Hat Local Security Checks	medium
64430	SuSE 11.2 Security Update : tomcat6 (SAT Patch Number 7208)	Nessus	SuSE Local Security Checks	medium
63535	Ubuntu 10.04 LTS / 11.10 / 12.04 LTS / 12.10 : tomcat6, tomcat7 vulnerabilities (USN-1685-1)	Nessus	Ubuntu Local Security Checks	medium
63364	FreeBSD : tomcat -- denial of service (134acaa2-51ef-11e2-8e34-0022156e8794)	Nessus	FreeBSD Local Security Checks	low
63309	Fedora 16 : tomcat-7.0.33-1.fc16 (2012-20151)	Nessus	Fedora Local Security Checks	medium
800617	Apache Tomcat 7.0.x < 7.0.28 Header Parsing Remote Denial of Service	Log Correlation Engine	Web Servers	medium
800612	Apache Tomcat 6.0.x < 6.0.36 Multiple Vulnerabilities	Log Correlation Engine	Web Servers	medium
62987	Apache Tomcat 6.0.x < 6.0.36 Multiple Vulnerabilities	Nessus	Web Servers	medium
62985	Apache Tomcat 7.0.0 < 7.0.28 multiple vulnerabilities	Nessus	Web Servers	medium

Detections

Analytics

CVE-2012-4534

low

Tenable Plugins

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