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CVE-2014-4650

Status Candidate

Overview

The CGIHTTPServer module in Python 2.7.5 and 3.3.4 does not properly handle URLs in which URL encoding is used for path separators, which allows remote attackers to read script source code or conduct directory traversal attacks and execute unintended code via a crafted character sequence, as demonstrated by a %2f separator.

Related Files

Red Hat Security Advisory 2015-2101-01
Posted Nov 20, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2101-01 - Python is an interpreted, interactive, object-oriented programming language often compared to Tcl, Perl, Scheme, or Java. Python includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. It was discovered that the Python xmlrpclib module did not restrict the size of gzip-compressed HTTP responses. A malicious XMLRPC server could cause an XMLRPC client using xmlrpclib to consume an excessive amount of memory.

tags | advisory, java, web, perl, python
systems | linux, redhat
advisories | CVE-2013-1752, CVE-2013-1753, CVE-2014-4616, CVE-2014-4650, CVE-2014-7185
SHA-256 | cc582ebc49e27cc4fafe81b106e309a23e455c02652176ce97cad6da6638b90a
Red Hat Security Advisory 2015-1330-01
Posted Jul 22, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-1330-01 - Python is an interpreted, interactive, object-oriented programming language often compared to Tcl, Perl, Scheme, or Java. Python includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. It was discovered that the socket.recvfrom_into() function failed to check the size of the supplied buffer. This could lead to a buffer overflow when the function was called with an insufficiently sized buffer.

tags | advisory, java, overflow, perl, python
systems | linux, redhat
advisories | CVE-2013-1752, CVE-2014-1912, CVE-2014-4650, CVE-2014-7185
SHA-256 | 86acf923f3d4731743976325c7a7a70ef4af62a60ea0a6aae6fa1075259c53be
Ubuntu Security Notice USN-2653-1
Posted Jun 25, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2653-1 - It was discovered that multiple Python protocol libraries incorrectly limited certain data when connecting to servers. A malicious ftp, http, imap, nntp, pop or smtp server could use this issue to cause a denial of service. It was discovered that the Python xmlrpc library did not limit unpacking gzip-compressed HTTP bodies. A malicious server could use this issue to cause a denial of service. Various other issues were also addressed.

tags | advisory, web, denial of service, imap, protocol, python
systems | linux, ubuntu
advisories | CVE-2013-1752, CVE-2013-1753, CVE-2014-4616, CVE-2014-4650, CVE-2014-7185
SHA-256 | c92a23a6c2ffef9c5e260503201c22b883bc893d34393a43e5e16c00a1a6be64
Red Hat Security Advisory 2015-1064-01
Posted Jun 4, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-1064-01 - Python is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, high-level dynamic data types, and dynamic typing. The python27 collection provide a stable release of Python 2.7 with a number of additional utilities and database connectors for MySQL and PostgreSQL. The python27-python packages have been upgraded to upstream version 2.7.8, which provides numerous bug fixes over the previous version.

tags | advisory, python
systems | linux, redhat
advisories | CVE-2013-1752, CVE-2013-1753, CVE-2014-1912, CVE-2014-4616, CVE-2014-4650, CVE-2014-7185
SHA-256 | c0e3cc2e371398b78ff43e1a431500d56f2413e503a376c528eedca74106238f
Mandriva Linux Security Advisory 2015-076
Posted Mar 27, 2015
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2015-076 - Updated python3 packages fix security vulnerabilities. ZipExtFile.read goes into 100% CPU infinite loop on maliciously binary edited zips. A vulnerability was reported in Python's socket module, due to a boundary error within the sock_recvfrom_into() function, which could be exploited to cause a buffer overflow. This could be used to crash a Python application that uses the socket.recvfrom_info() function or, possibly, execute arbitrary code with the permissions of the user running vulnerable Python code. It was reported that a patch added to Python 3.2 caused a race condition where a file created could be created with world read/write permissions instead of the permissions dictated by the original umask of the process. This could allow a local attacker that could win the race to view and edit files created by a program using this call. Note that prior versions of Python, including 2.x, do not include the vulnerable _get_masked_mode() function that is used by os.makedirs() when exist_ok is set to True. Python are susceptible to arbitrary process memory reading by a user or adversary due to a bug in the _json module caused by insufficient bounds checking. The bug is caused by allowing the user to supply a negative value that is used an an array index, causing the scanstring function to access process memory outside of the string it is intended to access. The CGIHTTPServer Python module does not properly handle URL-encoded path separators in URLs. This may enable attackers to disclose a CGI script's source code or execute arbitrary scripts in the server's document root.

tags | advisory, overflow, arbitrary, local, cgi, root, vulnerability, python
systems | linux, mandriva
advisories | CVE-2013-7338, CVE-2014-1912, CVE-2014-2667, CVE-2014-4616, CVE-2014-4650
SHA-256 | ab76b20f26c250158d7fa23532b4b88bd262202a2dbe4ad2a031d1e8a96c39eb
Mandriva Linux Security Advisory 2015-075
Posted Mar 27, 2015
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2015-075 - A vulnerability was reported in Python's socket module, due to a boundary error within the sock_recvfrom_into() function, which could be exploited to cause a buffer overflow. This could be used to crash a Python application that uses the socket.recvfrom_info() function or, possibly, execute arbitrary code with the permissions of the user running vulnerable Python code. This updates the python package to version 2.7.6, which fixes several other bugs, including denial of service flaws due to unbound readline() calls in the ftplib and nntplib modules. Denial of service flaws due to unbound readline() calls in the imaplib, poplib, and smtplib modules. A gzip bomb and unbound read denial of service flaw in python XMLRPC library. Python are susceptible to arbitrary process memory reading by a user or adversary due to a bug in the _json module caused by insufficient bounds checking. The bug is caused by allowing the user to supply a negative value that is used an an array index, causing the scanstring function to access process memory outside of the string it is intended to access. The CGIHTTPServer Python module does not properly handle URL-encoded path separators in URLs. This may enable attackers to disclose a CGI script's source code or execute arbitrary scripts in the server's document root. Python before 2.7.8 is vulnerable to an integer overflow in the buffer type. When Python's standard library HTTP clients (httplib, urllib, urllib2, xmlrpclib) are used to access resources with HTTPS, by default the certificate is not checked against any trust store, nor is the hostname in the certificate checked against the requested host. It was possible to configure a trust root to be checked against, however there were no faculties for hostname checking. The python-pip and tix packages was added due to missing build dependencies.

tags | advisory, web, denial of service, overflow, arbitrary, cgi, root, python
systems | linux, mandriva
advisories | CVE-2013-1752, CVE-2013-1753, CVE-2014-1912, CVE-2014-4616, CVE-2014-4650, CVE-2014-7185, CVE-2014-9365
SHA-256 | 3b0a1e39fae22b4d6476806ca1197785de85b0ad0d0836ae88ff10eef9f34bcf
Python CGIHTTPServer File Disclosure / Code Execution
Posted Jun 27, 2014
Site redteam-pentesting.de

The CGIHTTPServer Python module does not properly handle URL-encoded path separators in URLs. This may enable attackers to disclose a CGI script's source code or execute arbitrary CGI scripts in the server's document root.

tags | exploit, arbitrary, cgi, root, python
advisories | CVE-2014-4650
SHA-256 | 01a64b6c75c2c538d377c20d172e63cd36ed7553c62d8c8bc2aab7496757c955
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