CVE-2018-20852

http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.

Python is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, high-level dynamic data types, and dynamic typing. The python27 packages provide a stable release of Python 2.7 with a number of additional utilities and database connectors for MySQL and PostgreSQL.

The following packages have been upgraded to a later upstream version: python2 (2.7.17). (BZ#1759944)

Security Fix(es):

• python-urllib3: Cross-host redirect does not remove Authorization header allow for credential exposure (CVE-2018-20060)

• python: Cookie domain check returns incorrect results (CVE-2018-20852)

• python-urllib3: CRLF injection due to not encoding the '\r\n' sequence leading to possible attack on internal service (CVE-2019-11236)

• python-urllib3: Certification mishandle when error should be thrown (CVE-2019-11324)

• python: email.utils.parseaddr wrongly parses email addresses (CVE-2019-16056)

• python-requests: Redirect from HTTPS to HTTP does not remove Authorization header (CVE-2018-18074)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.2 Release Notes linked from the References section.

http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.

Python is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, high-level dynamic data types, and dynamic typing. The python27 packages provide a stable release of Python 2.7 with a number of additional utilities and database connectors for MySQL and PostgreSQL.

The following packages have been upgraded to a later upstream version: python2 (2.7.17). (BZ#1759944)

Security Fix(es):

• python-urllib3: Cross-host redirect does not remove Authorization header allow for credential exposure (CVE-2018-20060)

• python: Cookie domain check returns incorrect results (CVE-2018-20852)

• python-urllib3: CRLF injection due to not encoding the '\r\n' sequence leading to possible attack on internal service (CVE-2019-11236)

• python-urllib3: Certification mishandle when error should be thrown (CVE-2019-11324)

• python: email.utils.parseaddr wrongly parses email addresses (CVE-2019-16056)

• python-requests: Redirect from HTTPS to HTTP does not remove Authorization header (CVE-2018-18074)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

• Add Oracle Linux distribution in platform.py
• CVE-2018-20852: Prefix dot in domain for proper subdomain validation
• CVE-2020-8492: Python allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client
• CVE-2020-26116: http.client allows CRLF injection if the attacker controls the HTTP request method
• CVE-2020-27619: Unsafe use of eval() on data retrieved via HTTP in the test suite

• Add Oracle Linux distribution in platform.py
• CVE-2018-20852: Prefix dot in domain for proper subdomain validation
• CVE-2020-8492: Python allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client
• CVE-2020-26116: http.client allows CRLF injection if the attacker controls the HTTP request method
• CVE-2020-27619: Unsafe use of eval() on data retrieved via HTTP in the test suite

This update for python fixes the following issues:

• CVE-2018-20852: Fixed an information leak where cookies could be send to the wrong server because of incorrect domain validation (bsc#1141853).

This update was imported from the SUSE:SLE-15:Update update project.

This update for python fixes the following issues:

• CVE-2018-20852: Fixed an information leak where cookies could be send to the wrong server because of incorrect domain validation (bsc#1141853).

This update was imported from the SUSE:SLE-15:Update update project.

This update for python3 to version 3.6.10 fixes the following issues:

• CVE-2017-18207: Fixed a denial of service in Wave_read._read_fmt_chunk() (bsc#1083507).
• CVE-2019-16056: Fixed an issue where email parsing could fail for multiple @ (bsc#1149955).
• CVE-2019-15903: Fixed a heap-based buffer over-read in libexpat (bsc#1149429).

This update was imported from the SUSE:SLE-15:Update update project.

These are all security issues fixed in the python-2.7.18-8.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python36-3.6.15-1.1 package on the GA media of openSUSE Tumbleweed.

This update for python fixes the following issues:

• CVE-2019-10160: Fixed a regression in urlparse() and urlsplit() introduced by the fix for CVE-2019-9636 (bsc#1138459).
• CVE-2018-20852: Fixed an information leak where cookies could be send to the wrong server because of incorrect domain validation (bsc#1141853).

This update contains the Mozilla Firefox ESR 68.2 release.

Mozilla Firefox was updated to ESR 68.2 release:

• Enterprise: New administrative policies were added. More information and templates are available at the Policy Templates page.

• Various security fixes: MFSA 2019-33 (bsc#1154738)

  • CVE-2019-15903: Heap overflow in expat library in XML_GetCurrentLineNumber
  • CVE-2019-11757: Use-after-free when creating index updates in IndexedDB
  • CVE-2019-11758: Potentially exploitable crash due to 360 Total Security
  • CVE-2019-11759: Stack buffer overflow in HKDF output
  • CVE-2019-11760: Stack buffer overflow in WebRTC networking
  • CVE-2019-11761: Unintended access to a privileged JSONView object
  • CVE-2019-11762: document.domain-based origin isolation has same-origin- property violation
  • CVE-2019-11763: Incorrect HTML parsing results in XSS bypass technique
  • CVE-2019-11764: Memory safety bugs fixed in Firefox 70 and Firefox ESR 68.2

Other Issues resolved:

• [bsc#1104841] Newer versions of firefox have a dependency on GLIBCXX_3.4.20
• [bsc#1074235] MozillaFirefox: background tab crash reports sent inadvertently without user opt-in
• [bsc#1043008] Firefox hangs randomly when browsing and scrolling
• [bsc#1025108] Firefox stops loading page until mouse is moved
• [bsc#905528] Firefox malfunctions due to broken omni.ja archives

This update for python3 fixes the following issues:

Security issue fixed:

• CVE-2019-10160: Fixed a regression in urlparse() and urlsplit() introduced by the fix for CVE-2019-9636 (bsc#1138459).
• CVE-2018-20852: Fixed an information leak where cookies could be send to the wrong server because of incorrect domain validation (bsc#1141853).

Non-security issue fixed:

• Fixed an issue where the SIGINT signal was ignored or not handled (bsc#1094814).

This update for python fixes the following issues:

• CVE-2019-10160: Fixed a regression in urlparse() and urlsplit() introduced by the fix for CVE-2019-9636 (bsc#1138459).
• CVE-2018-20852: Fixed an information leak where cookies could be send to the wrong server because of incorrect domain validation (bsc#1141853).

This update for python fixes the following issues:

• CVE-2018-20852: Fixed an information leak where cookies could be send to the wrong server because of incorrect domain validation (bsc#1141853).

This update for python3 fixes the following issues:

• CVE-2019-16056: Fixed a parser issue in the email module. (bsc#1149955)
• CVE-2018-20852: Fixed an incorrect domain validation that could lead to cookies being sent to the wrong server. (bsc#1141853)

This update for python3 to version 3.6.10 fixes the following issues:

• CVE-2017-18207: Fixed a denial of service in Wave_read._read_fmt_chunk() (bsc#1083507).
• CVE-2019-16056: Fixed an issue where email parsing could fail for multiple @ (bsc#1149955).
• CVE-2019-15903: Fixed a heap-based buffer over-read in libexpat (bsc#1149429).

This update for python fixes the following issues:

Updated to version 2.7.17 to unify packages among openSUSE:Factory and SLE versions (bsc#1159035).

This update for python36 to version 3.6.10 fixes the following issues:

• CVE-2017-18207: Fixed a denial of service in Wave_read._read_fmt_chunk() (bsc#1083507).
• CVE-2019-16056: Fixed an issue where email parsing could fail for multiple @ signs (bsc#1149955).
• CVE-2019-15903: Fixed a heap-based buffer over-read in libexpat (bsc#1149429).

This update for python3 fixes the following issues:

• CVE-2019-20907: Fixed denial of service by avoiding possible infinite loop in specifically crafted tarball (bsc#1174091).
• CVE-2020-14422: Fixed an improper computation of hash values in the IPv4Interface and IPv6Interface could have led to denial of service (bsc#1173274).
• CVE-2019-16935: Fixed a reflected XSS in python/Lib/DocXMLRPCServer.py (bsc#1153238).
• CVE-2019-9947: Fixed an issue in urllib2 which allowed CRLF injection if the attacker controls a url parameter (bsc#1130840).
• If the locale is 'C', coerce it to C.UTF-8 (bsc#1162423).

It was discovered that Python incorrectly handled certain pickle files. An attacker could possibly use this issue to consume memory, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-20406)

It was discovered that Python incorrectly validated the domain when handling cookies. An attacker could possibly trick Python into sending cookies to the wrong domain. (CVE-2018-20852)

Jonathan Birch and Panayiotis Panayiotou discovered that Python incorrectly handled Unicode encoding during NFKC normalization. An attacker could possibly use this issue to obtain sensitive information. (CVE-2019-9636, CVE-2019-10160)

Colin Read and Nicolas Edet discovered that Python incorrectly handled parsing certain X509 certificates. An attacker could possibly use this issue to cause Python to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-5010)

It was discovered that Python incorrectly handled certain urls. A remote attacker could possibly use this issue to perform CRLF injection attacks. (CVE-2019-9740, CVE-2019-9947)

Sihoon Lee discovered that Python incorrectly handled the local_file: scheme. A remote attacker could possibly use this issue to bypass blocklist meschanisms. (CVE-2019-9948)

USN-4127-1 fixed several vulnerabilities in Python. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that Python incorrectly handled certain pickle files. An attacker could possibly use this issue to consume memory, leading to a denial of service. This issue only affected Ubuntu 14.04 ESM. (CVE-2018-20406)

It was discovered that Python incorrectly validated the domain when handling cookies. An attacker could possibly trick Python into sending cookies to the wrong domain. (CVE-2018-20852)

Jonathan Birch and Panayiotis Panayiotou discovered that Python incorrectly handled Unicode encoding during NFKC normalization. An attacker could possibly use this issue to obtain sensitive information. (CVE-2019-9636, CVE-2019-10160)

Colin Read and Nicolas Edet discovered that Python incorrectly handled parsing certain X509 certificates. An attacker could possibly use this issue to cause Python to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 ESM. (CVE-2019-5010)

It was discovered that Python incorrectly handled certain urls. A remote attacker could possibly use this issue to perform CRLF injection attacks. (CVE-2019-9740, CVE-2019-9947)

Sihoon Lee discovered that Python incorrectly handled the local_file: scheme. A remote attacker could possibly use this issue to bypass blocklist meschanisms. (CVE-2019-9948)

It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2015-20107)

It was discovered that Python incorrectly used regular expressions vulnerable to catastrophic backtracking. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-1060, CVE-2018-1061)

It was discovered that Python failed to initialize Expat’s hash salt. A remote attacker could possibly use this issue to cause hash collisions, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-14647)

It was discovered that Python incorrectly handled certain pickle files. An attacker could possibly use this issue to consume memory, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-20406)

It was discovered that Python incorrectly validated the domain when handling cookies. An attacker could possibly trick Python into sending cookies to the wrong domain. This issue only affected Ubuntu 14.04 LTS. (CVE-2018-20852)

Jonathan Birch and Panayiotis Panayiotou discovered that Python incorrectly handled Unicode encoding during NFKC normalization. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9636, CVE-2019-10160)

It was discovered that Python incorrectly parsed certain email addresses. A remote attacker could possibly use this issue to trick Python applications into accepting email addresses that should be denied. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-16056)

It was discovered that the Python documentation XML-RPC server incorrectly handled certain fields. A remote attacker could use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-16935)

It was discovered that Python documentation had a misleading information. A security issue could be possibly caused by wrong assumptions of this information. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-17514)

It was discovered that Python incorrectly stripped certain characters from requests. A remote attacker could use this issue to perform CRLF injection. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-18348)

It was discovered that Python incorrectly handled certain TAR archives. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-20907)

Colin Read and Nicolas Edet discovered that Python incorrectly handled parsing certain X509 certificates. An attacker could possibly use this issue to cause Python to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-5010)

It was discovered that incorrectly handled certain ZIP files. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9674)

It was discovered that Python incorrectly handled certain urls. A remote attacker could possibly use this issue to perform CRLF injection attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9740, CVE-2019-9947)

Sihoon Lee discovered that Python incorrectly handled the local_file: scheme. A remote attacker could possibly use this issue to bypass blocklist meschanisms. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9948)

It was discovered that Python incorrectly handled certain IP values. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-14422)

It was discovered that Python incorrectly handled certain character sequences. A remote attacker could possibly use this issue to perform CRLF injection. This issue only affected Ubuntu 14.04 LTS and Ubuntu…