PSF-2017-3 Zlib 1.2.11

inffast.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic...

PSF-2017-10 urllib FTP protocol stream injection

FTP protocol stream injection via malicious URLs...

PSF-2016-10 gettext.c2py()

Arbitrary code execution in gettext.c2py...

PSF-2016-8 HTTP header injection

CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython aka Python before 2.7.10 and 3.x before 3.4.4 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL...

PSF-2016-7 zipimporter overflow

Integer overflow in the getdata function in zipimport.c in CPython aka Python before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 allows remote attackers to have unspecified impact via a negative data size value, which triggers a heap-based buffer overflow...

PSF-2016-3 smtplib TLS stripping

The smtplib library in CPython aka Python before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 does not return an error when StartTLS fails, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block...

PSF-2016-4 Sweet32 attack (DES, 3DES)

The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other protocols and products, have a birthday bound of approximately four billion blocks, which makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted...

PSF-2016-5 Windows: vulnerable bzip2 1.0.6

Use-after-free vulnerability in bzip2recover in bzip2 1.0.6 allows remote attackers to cause a denial of service crash via a crafted bzip2 file, related to block ends set to before the start of the block...

PSF-2016-6 Expat 2.2 (Expat bug #537)

The overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service crash or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and...

PSF-2016-1 ssl.match_hostname() IDNA issue

The ssl.matchhostname function in CPython aka Python before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate...

PSF-2016-2 Expat 2.2 (Expat bug #537)

Expat allows context-dependent attackers to cause a denial of service crash or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow...

PSF-2016-9 Issue #26657: HTTP server directory traversal

Fix directory traversal vulnerability with http.server and SimpleHTTPServer on Windows. Regression of Python 3.3.5. Python issue reported at 2016-03-14...

PSF-2015-1 Issue #26556: Expat 2.1.1

Multiple integer overflows in the XMLGetBuffer function in Expat through 2.1.0, as used in Google Chrome before 44.0.2403.89 and other products, allow remote attackers to cause a denial of service heap-based buffer overflow or possibly have unspecified other impact via crafted XML data, a related...

PSF-2014-7 Validate TLS certificate

The HTTP clients in the 1 httplib, 2 urllib, 3 urllib2, and 4 xmlrpclib libraries in CPython aka Python 2.x before 2.7.9 and 3.x before 3.4.3, when accessing an HTTPS URL, do not a check the certificate against a trust store or verify that the server hostname matches a domain name in the subject'...

PSF-2014-5 os.makedirs() not thread-safe

Race condition in the getmaskedmode function in Lib/os.py in Python 3.2 through 3.5, when existok is set to true and multiple threads are used, might allow local users to bypass intended file permissions by leveraging a separate application vulnerability before the umask has been set to the...

PSF-2014-6 buffer() integer overflows

Integer overflow in bufferobject.c in Python before 2.7.8 allows context-dependent attackers to obtain sensitive information from process memory via a large size and offset in a "buffer" function...

PSF-2014-2 Hash function not randomized properly

Python 2.7 before 3.4 only uses the last eight bits of the prefix to randomize hash values, which causes it to compute hash values without restricting the ability to trigger hash collisions predictably and makes it easier for context-dependent attackers to cause a denial of service CPU consumptio...

PSF-2014-3 zipfile DoS using invalid file size

Python before 3.3.4 RC1 allows remote attackers to cause a denial of service infinite loop and CPU consumption via a file size value larger than the size of the zip file to the 1 ZipExtFile.read, 2 ZipExtFile.readn, 3 ZipExtFile.readlines, 4 ZipFile.extract, or 5 ZipFile.extractall function...

PSF-2014-4 socket.recvfrom_into() overflow

Buffer overflow in the socket.recvfrominto function in Modules/socketmodule.c in Python 2.5 before 2.7.7, 3.x before 3.3.4, and 3.4.x before 3.4rc1 allows remote attackers to execute arbitrary code via a crafted string...

PSF-2014-1 CVE-2013-0340 Billion Laughs fixed in Expat 2.4.0

expat 2.1.0 and earlier does not properly handle entities expansion unless an application developer uses the XMLSetEntityDeclHandler function, which allows remote attackers to cause a denial of service resource consumption, send HTTP requests to intranet servers, or read arbitrary files via a...

PSF-2013-3 CGI directory traversal (URL parsing)

An error in separating the path and filename of the CGI script to run in http.server.CGIHTTPRequestHandler allows running arbitrary executables in the directory under which the server was started...

PSF-2013-1 ssl.match_hostname() wildcard DoS

Algorithmic complexity vulnerability in the ssl.matchhostname function in Python 3.2.x, 3.3.x, and earlier, and unspecified versions of python-backports-sslmatchhostname as used for older Python versions, allows remote attackers to cause a denial of service CPU consumption via multiple wildcard...

PSF-2013-2 ssl: NULL in subjectAltNames

The ssl.matchhostname function in the SSL module in Python 2.6 through 3.4 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate...

PSF-2012-3 XML-RPC DoS

SimpleXMLRPCServer.py in SimpleXMLRPCServer in Python before 2.6.8, 2.7.x before 2.7.3, 3.x before 3.1.5, and 3.2.x before 3.2.3 allows remote attackers to cause a denial of service infinite loop and CPU consumption via an XML-RPC POST request that contains a smaller amount of data than specified...

PSF-2012-5 Hash DoS

Python before 2.6.8, 2.7.x before 2.7.3, 3.x before 3.1.5, and 3.2.x before 3.2.3 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service CPU consumption via crafted input to an application...

PSF-2012-2 pypirc created insecurely

Python 2.6 through 3.2 creates /.pypirc with world-readable permissions before changing them after data has been written, which introduces a race condition that allows local users to obtain a username and password by reading this file...

PSF-2012-6 Vulnerability in the utf-16 decoder after error handling

The utf-16 decoder in Python 3.1 through 3.3 does not update the alignedend variable after calling the unicodedecodecallerrorhandler function, which allows remote attackers to obtain sensitive information process memory or cause a denial of service memory corruption and crash via unspecified...

PSF-2012-4 Expat 2.2.1

The XML parser xmlparse.c in expat before 2.1.0 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service CPU consumption via an XML file with many identifiers with the same value...

PSF-2012-1 SimpleHTTPServer UTF-7

The listdirectory function in Lib/SimpleHTTPServer.py in SimpleHTTPServer in Python before 2.5.6c1, 2.6.x before 2.6.7 rc2, and 2.7.x before 2.7.2 does not place a charset parameter in the Content-Type HTTP header, which makes it easier for remote attackers to conduct cross-site scripting XSS...

PSF-2011-3 ssl CBC IV attack

The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other products, encrypts data by using CBC mode with chained initialization vectors, which allows man-in-the-middle attackers to obtain plaintext HT...

PSF-2011-2 urllib redirect

The urllib and urllib2 modules in Python 2.x before 2.7.2 and 3.x before 3.2.1 process Location headers that specify redirection to file: URLs, which makes it easier for remote attackers to obtain sensitive information or cause a denial of service resource consumption via a crafted URL, as...

PSF-2011-1 CGI directory traversal (is_cgi() function)

The iscgi method in CGIHTTPServer.py in the CGIHTTPServer module in Python 2.5, 2.6, and 3.0 allows remote attackers to read script source code via an HTTP GET request that lacks a / slash character at the beginning of the URI...

PSF-2010-7 smtpd accept bug and race condition

Multiple race conditions in smtpd.py in the smtpd module in Python 2.6, 2.7, 3.1, and 3.2 alpha allow remote attackers to cause a denial of service daemon outage by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None...

PSF-2010-6 smtpd accept bug and race condition

The asyncore module in Python before 3.2 does not properly handle unsuccessful calls to the accept function, and does not have accompanying documentation describing how daemon applications should handle unsuccessful calls to the accept function, which makes it easier for remote attackers to condu...

PSF-2010-4 audioop integer overflows

Multiple integer overflows in audioop.c in the audioop module in Python 2.6, 2.7, 3.1, and 3.2 allow context-dependent attackers to cause a denial of service application crash via a large fragment, as demonstrated by a call to audioop.lin2lin with a long string in the first argument, leading to a...

PSF-2010-2 rgbimg and imageop overflows

Integer overflow in rgbimgmodule.c in the rgbimg module in Python 2.5 allows remote attackers to have an unspecified impact via a large image that triggers a buffer overflow. NOTE: this vulnerability exists because of an incomplete fix for CVE-2008-3143.12...

PSF-2010-5 audioop input validation

The audioop module in Python 2.7 and 3.2 does not verify the relationships between size arguments and byte string lengths, which allows context-dependent attackers to cause a denial of service memory corruption and application crash via crafted arguments, as demonstrated by a call to...

PSF-2010-3 rgbimg and imageop overflows

Multiple buffer overflows in the RLE decoder in the rgbimg module in Python 2.5 allow remote attackers to have an unspecified impact via an image file containing crafted data that triggers improper processing within the 1 longimagedata or 2 expandrow function...

PSF-2010-1 rgbimg and imageop overflows

Buffer underflow in the rgbimg module in Python 2.5 allows remote attackers to cause a denial of service application crash via a large ZSIZE value in a black-and-white aka B/W RGB image that triggers an invalid pointer dereference...

PSF-2008-10 expandtab() integer overflow

Multiple integer overflows in Python 2.2.3 through 2.5.1, and 2.6, allow context-dependent attackers to have an unknown impact via a large integer value in the tabsize argument to the expandtabs method, as implemented by 1 the stringexpandtabs function in Objects/stringobject.c and 2 the...

PSF-2008-9 Multiple integer overflows (Apple)

Multiple integer overflows in imageop.c in the imageop module in Python 1.5.2 through 2.5.1 allow context-dependent attackers to break out of the Python VM and execute arbitrary code via large integer values in certain arguments to the crop function, leading to a buffer overflow, a different...

PSF-2008-7 Multiple integer overflows (Google)

Multiple integer overflows in Python before 2.5.2 might allow context-dependent attackers to have an unknown impact via vectors related to 1 Include/pymem.h; 2 csv.c, 3 struct.c, 4 arraymodule.c, 5 audioop.c, 6 binascii.c, 7 cPickle.c, 8 cStringIO.c, 9 cjkcodecs/multibytecodec.c, 10...

PSF-2008-4 Multiple integer overflows (Apple)

Multiple integer overflows in Python 2.5.2 and earlier allow context-dependent attackers to have an unknown impact via vectors related to the 1 stringobject, 2 unicodeobject, 3 bufferobject, 4 longobject, 5 tupleobject, 6 stropmodule, 7 gcmodule, and 8 mmapmodule modules. NOTE: The expandtabs...

PSF-2008-5 Multiple integer overflows (Apple)

Integer overflow in hashopenssl.c in the hashlib module in Python 2.5.2 and earlier might allow context-dependent attackers to defeat cryptographic digests, related to "partial hashlib hashing of data exceeding 4GB."...

PSF-2008-8 Multiple integer overflows (Apple)

Multiple integer overflows in the PyOSvsnprintf function in Python/mysnprintf.c in Python 2.5.2 and earlier allow context-dependent attackers to cause a denial of service memory corruption or have unspecified other impact via crafted input to string formatting operations. NOTE: the handling of...

PSF-2008-6 Multiple integer overflows (Apple)

Multiple buffer overflows in Python 2.5.2 and earlier on 32bit platforms allow context-dependent attackers to cause a denial of service crash or have unspecified other impact via a long string that leads to incorrect memory allocation during Unicode string processing, related to the unicoderesize...

PSF-2008-1 Multiple integer overflows (Apple)

Multiple integer overflows in imageop.c in Python before 2.5.3 allow context-dependent attackers to cause a denial of service crash and possibly execute arbitrary code via crafted images that trigger heap-based buffer overflows. NOTE: this issue is due to an incomplete fix for CVE-2007-4965...

PSF-2008-3 Multiple integer overflows (Apple)

Python 2.5.2 and earlier allows context-dependent attackers to execute arbitrary code via multiple vectors that cause a negative size value to be provided to the PyStringFromStringAndSize function, which allocates less memory than expected when assert is disabled and triggers a buffer overflow...

PSF-2008-2 Multiple integer overflows (Apple)

Integer signedness error in the zlib extension module in Python 2.5.2 and earlier allows remote attackers to execute arbitrary code via a negative signed integer, which triggers insufficient memory allocation and a buffer overflow...

PSF-2007-1 rgbimg and imageop overflows

Multiple integer overflows in the imageop module in Python 2.5.1 and earlier allow context-dependent attackers to cause a denial of service application crash and possibly obtain sensitive information memory contents via crafted arguments to 1 the tovideo method, and unspecified other vectors...