月度归档： 2016年10月

Cisco AnyConnect is a VPN Client for multiple platforms.

The Cisco AnyConnect Secure Mobility Client is affected by the following vulnerabilities:
– The vulnerability is due to insufficient path traversal protections in certain IPC commands which could allow an attacker to write or overwrite arbitrary files on the filesystem.
– The vulnerability is due to missing input sanitization of certain IPC commands which may allow the attacker to write to arbitrary user-space memory.

Affected Versions:
Cisco AnyConnect Secure Mobility Client 4.0(.00051) and earlier

Successful exploitation will allow an attacker to execute arbitrary code, disclose sensitive information and overwrite arbitrary files on the filesystem.

Cisco has confirmed the vulnerability however no patch is available as of now.

Workaround:
Administrators are advised to contact the vendor regarding future updates and releases.

It was discovered that python-twisted-web used the value of the Proxy header from HTTP requests to initialize the HTTP_PROXY environment variable for CGI scripts, which in turn was incorrectly used by certain HTTP client implementations to configure the proxy for outgoing HTTP requests. A remote attacker could possibly use this flaw to redirect HTTP requests performed by a CGI script to an attacker-controlled proxy via a malicious HTTP request.

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

Please refer to Amazon advisory ALAS-2016-760 for affected packages and patching details, or update with your package manager.

Patch:
Following are links for downloading patches to fix the vulnerabilities:

ALAS-2016-760: Amazon Linux (python-twisted-web (8.2.0-5.5.amzn1) on src)

It was discovered that the Hotspot component of OpenJDK did not properly check arguments of the System.arraycopy() function in certain cases. An untrusted Java application or applet could use this flaw to corrupt virtual machine’s memory and completely bypass Java sandbox restrictions. (CVE-2016-5582 )

It was discovered that the Hotspot component of OpenJDK did not properly check received Java Debug Wire Protocol (JDWP) packets. An attacker could possibly use this flaw to send debugging commands to a Java program running with debugging enabled if they could make victim’s browser send HTTP requests to the JDWP port of the debugged application. (CVE-2016-5573 )

It was discovered that the Libraries component of OpenJDK did not restrict the set of algorithms used for JAR integrity verification. This flaw could allow an attacker to modify content of the JAR file that used weak signing key or hash algorithm. (CVE-2016-5542 ) (Note: After this update, MD2 hash algorithm and RSA keys with less than 1024 bits are no longer allowed to be used for Jar integrity verification by default. MD5 hash algorithm is expected to be disabled by default in the future updates. A newly introduced security property jdk.jar.disabledAlgorithms can be used to control the set of disabled algorithms.)

A flaw was found in the way the JMX component of OpenJDK handled classloaders. An untrusted Java application or applet could use this flaw to bypass certain Java sandbox restrictions. (CVE-2016-5554 )

A flaw was found in the way the Networking component of OpenJDK handled HTTP proxy authentication. A Java application could possibly expose HTTPS server authentication credentials via a plain text network connection to an HTTP proxy if proxy asked for authentication. (CVE-2016-5597 )

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

Please refer to Amazon advisory ALAS-2016-759 for affected packages and patching details, or update with your package manager.

Patch:
Following are links for downloading patches to fix the vulnerabilities:

ALAS-2016-759: Amazon Linux (java-1.8.0-openjdk (1.8.0.111-1.b15.25.amzn1) on noarch)

ALAS-2016-759: Amazon Linux (java-1.8.0-openjdk (1.8.0.111-1.b15.25.amzn1) on x86_64)

ALAS-2016-759: Amazon Linux (java-1.8.0-openjdk (1.8.0.111-1.b15.25.amzn1) on src)

ALAS-2016-759: Amazon Linux (java-1.8.0-openjdk (1.8.0.111-1.b15.25.amzn1) on i686)