Univention Bugzilla – Bug 56101
python2.7: Multiple issues (5.0)
Last modified: 2023-05-31 15:38:02 CEST
New Debian python2.7 2.7.16-2+deb10u2 fixes: This update addresses the following issues: 2.7.16-2+deb10u2 (Tue, 23 May 2023 16:13:27 +0200) * Non-maintainer upload by the LTS Security Team. * Update self-signed.pythontest.net SSL certificate in testsuite (fixes test_httplib test suite) * CVE-2015-20107: the mailcap module does not add escape characters into commands discovered in the system mailcap file. This may allow attackers to inject shell commands into applications that call mailcap.findmatch with untrusted input (if they lack validation of user-provided filenames or arguments). * CVE-2019-20907: in Lib/tarfile.py, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation. * CVE-2020-8492: Python allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking. * CVE-2020-26116: http.client allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request. * CVE-2021-3177: Python has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely. * CVE-2021-3733: There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. * CVE-2021-3737: An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. * CVE-2021-4189: the FTP (File Transfer Protocol) client library in PASV (passive) mode trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports. For the rare user who wants the previous behavior, set a `trust_server_pasv_ipv4_address` attribute on your `ftplib.FTP` instance to True. * CVE-2022-45061: An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service.
--- mirror/ftp/pool/main/p/python2.7/python2.7_2.7.16-2+deb10u1.dsc +++ apt/ucs_5.0-0-errata5.0-3/source/python2.7_2.7.16-2+deb10u2.dsc @@ -1,3 +1,51 @@ +2.7.16-2+deb10u2 [Tue, 23 May 2023 16:13:27 +0200] Sylvain Beucler <beuc@debian.org>: + + * Non-maintainer upload by the LTS Security Team. + * Update self-signed.pythontest.net SSL certificate in testsuite (fixes + test_httplib test suite) + * CVE-2015-20107: the mailcap module does not add escape characters into + commands discovered in the system mailcap file. This may allow + attackers to inject shell commands into applications that call + mailcap.findmatch with untrusted input (if they lack validation of + user-provided filenames or arguments). + * CVE-2019-20907: in Lib/tarfile.py, an attacker is able to craft a TAR + archive leading to an infinite loop when opened by tarfile.open, + because _proc_pax lacks header validation. (Closes: #970099) + * CVE-2020-8492: Python allows an HTTP server to conduct Regular + Expression Denial of Service (ReDoS) attacks against a client because + of urllib.request.AbstractBasicAuthHandler catastrophic + backtracking. (Closes: #970099) + * CVE-2020-26116: http.client allows CRLF injection if the attacker + controls the HTTP request method, as demonstrated by inserting CR and + LF control characters in the first argument of HTTPConnection.request. + * CVE-2021-3177: Python has a buffer overflow in PyCArg_repr in + _ctypes/callproc.c, which may lead to remote code execution in certain + Python applications that accept floating-point numbers as untrusted + input, as demonstrated by a 1e300 argument to + c_double.from_param. This occurs because sprintf is used unsafely. + * CVE-2021-3733: There's a flaw in urllib's AbstractBasicAuthHandler + class. An attacker who controls a malicious HTTP server that an HTTP + client (such as web browser) connects to, could trigger a Regular + Expression Denial of Service (ReDOS) during an authentication request + with a specially crafted payload that is sent by the server to the + client. + * CVE-2021-3737: An improperly handled HTTP response in the HTTP client + code of python may allow a remote attacker, who controls the HTTP + server, to make the client script enter an infinite loop, consuming + CPU time. + * CVE-2021-4189: the FTP (File Transfer Protocol) client library in PASV + (passive) mode trusts the host from the PASV response by default. This + flaw allows an attacker to set up a malicious FTP server that can + trick FTP clients into connecting back to a given IP address and + port. This vulnerability could lead to FTP client scanning ports. For + the rare user who wants the previous behavior, set a + `trust_server_pasv_ipv4_address` attribute on your `ftplib.FTP` + instance to True. + * CVE-2022-45061: An unnecessary quadratic algorithm exists in one path + when processing some inputs to the IDNA (RFC 3490) decoder, such that + a crafted, unreasonably long name being presented to the decoder could + lead to a CPU denial of service. + 2.7.16-2+deb10u1 [Fri, 11 Oct 2019 00:02:15 +0200] Moritz Mühlenhoff <jmm@debian.org>: * CVE-2018-20852 <http://piuparts.knut.univention.de/5.0-3/#16327816329192062>
OK: bug OK: yaml OK: announce_errata OK: patch ~OK: piuparts > After purging files have disappeared: > /usr/lib/python2.7/lib-dynload/ owned by: libpython2.7-minimal:amd64 [5.0-3] 1b63b97e40 Bug #56101: python2.7 2.7.16-2+deb10u2 doc/errata/staging/python2.7.yaml | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) [5.0-3] 2bf08ec48d Bug #56101: python2.7 2.7.16-2+deb10u2 doc/errata/staging/python2.7.yaml | 61 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+)
<https://errata.software-univention.de/#/?erratum=5.0x678>