Vulnerabilities > CVE-2018-20406 - Integer Overflow or Wraparound vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a "resize to twice the size" attempt. This issue might cause memory exhaustion, but is only relevant if the pickle format is used for serializing tens or hundreds of gigabytes of data. This issue is fixed in: v3.4.10, v3.4.10rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.7rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.7, v3.6.7rc1, v3.6.7rc2, v3.6.8, v3.6.8rc1, v3.6.9, v3.6.9rc1; v3.7.1, v3.7.1rc1, v3.7.1rc2, v3.7.2, v3.7.2rc1, v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Forced Integer Overflow This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2019-6B02154AA0.NASL description Last upstream Python 3.4 security release, 3.4.10. Security fix for CVE-2019-9636, CVE-2019-5010, CVE-2018-20406. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 123475 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123475 title Fedora 29 : python34 (2019-6b02154aa0) NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2019-1230.NASL description A NULL pointer dereference vulnerability was found in the certificate parsing code in Python. This causes a denial of service to applications when parsing specially crafted certificates. This vulnerability is unlikely to be triggered if application enables SSL/TLS certificate validation and accepts certificates only from trusted root certificate authorities. (CVE-2019-5010) Python 2.7.16 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. (CVE-2019-9636) A flaw was found in the way catastrophic backtracking was implemented in python last seen 2020-06-01 modified 2020-06-02 plugin id 126383 published 2019-07-02 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126383 title Amazon Linux 2 : python (ALAS-2019-1230) NASL family Fedora Local Security Checks NASL id FEDORA_2019-7D9F3CF3CE.NASL description Last upstream Python 3.4 security release, 3.4.10. Security fix for CVE-2019-9636, CVE-2019-5010, CVE-2018-20406. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 124511 published 2019-05-02 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124511 title Fedora 30 : python34 (2019-7d9f3cf3ce) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-4127-1.NASL description 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 blacklist meschanisms. (CVE-2019-9948). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 128631 published 2019-09-10 reporter Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/128631 title Ubuntu 16.04 LTS / 18.04 LTS / 19.04 : python2.7, python3.5, python3.6, python3.7 vulnerabilities (USN-4127-1) NASL family Fedora Local Security Checks NASL id FEDORA_2019-6BAEB15DA3.NASL description Last upstream Python 3.4 security release, 3.4.10. Security fix for CVE-2019-9636, CVE-2019-5010, CVE-2018-20406. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 123476 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123476 title Fedora 28 : python34 (2019-6baeb15da3) NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2019-1204.NASL description Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly.(CVE-2019-9636) Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a last seen 2020-06-01 modified 2020-06-02 plugin id 124594 published 2019-05-06 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124594 title Amazon Linux 2 : python3 (ALAS-2019-1204) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-2_0-0132_PYTHON3.NASL description An update of the python3 package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 122909 published 2019-03-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122909 title Photon OS 2.0: Python3 PHSA-2019-2.0-0132 NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-1_0-0212_PYTHON3.NASL description An update of the python3 package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 122924 published 2019-03-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122924 title Photon OS 1.0: Python3 PHSA-2019-1.0-0212 NASL family Fedora Local Security Checks NASL id FEDORA_2019-6E1938A3C5.NASL description Security update to Python 3.5.7. Security fix for CVE-2019-5010, CVE-2018-20406, CVE-2018-1060, CVE-2018-1061, CVE-2019-9636. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 123140 published 2019-03-27 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123140 title Fedora 29 : python35 (2019-6e1938a3c5) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1663.NASL description This DLA fixes a a problem parsing x509 certificates, an pickle integer overflow, and some other minor issues : CVE-2016-0772 The smtplib library in CPython 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 the StartTLS command, aka a last seen 2020-06-01 modified 2020-06-02 plugin id 122036 published 2019-02-08 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122036 title Debian DLA-1663-1 : python3.4 security update NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2019-1202.NASL description Python is affected by improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. (CVE-2019-9636) Modules/_pickle.c in Python has an integer overflow via a large LONG_BINPUT value that is mishandled during a last seen 2020-06-01 modified 2020-06-02 plugin id 124655 published 2019-05-07 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124655 title Amazon Linux AMI : python34 (ALAS-2019-1202) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0215-1.NASL description This update for python3 fixes the following issues : Security issue fixed : CVE-2019-5010: Fixed a denial-of-service vulnerability in the X509 certificate parser (bsc#1122191) CVE-2018-20406: Fixed a integer overflow via a large LONG_BINPUT (bsc#1120644) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-18 modified 2019-02-01 plugin id 121540 published 2019-02-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121540 title SUSE SLED15 / SLES15 Security Update : python3 (SUSE-SU-2019:0215-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-0114-1.NASL description 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). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 133036 published 2020-01-17 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133036 title SUSE SLED15 / SLES15 Security Update : python3 (SUSE-SU-2020:0114-1) (BEAST) (httpoxy) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-155.NASL description This update for python3 fixes the following issues : Security issue fixed : - CVE-2019-5010: Fixed a denial-of-service vulnerability in the X509 certificate parser (bsc#1122191) - CVE-2018-20406: Fixed a integer overflow via a large LONG_BINPUT (bsc#1120644) This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 122091 published 2019-02-11 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122091 title openSUSE Security Update : python3 (openSUSE-2019-155) NASL family Fedora Local Security Checks NASL id FEDORA_2019-51F1E08207.NASL description Security update to Python 3.5.7. Security fix for CVE-2019-5010, CVE-2018-20406, CVE-2018-1060, CVE-2018-1061, CVE-2019-9636. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 124492 published 2019-05-02 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124492 title Fedora 30 : python35 (2019-51f1e08207) NASL family Fedora Local Security Checks NASL id FEDORA_2019-CF725DD20B.NASL description Security update to Python 3.5.7. Security fix for CVE-2019-5010, CVE-2018-20406, CVE-2018-1060, CVE-2018-1061, CVE-2019-9636. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 123480 published 2019-03-29 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123480 title Fedora 28 : python35 (2019-cf725dd20b) NASL family SuSE Local Security Checks NASL id OPENSUSE-2020-86.NASL description 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. last seen 2020-06-01 modified 2020-06-02 plugin id 133172 published 2020-01-22 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133172 title openSUSE Security Update : python3 (openSUSE-2020-86) (BEAST) (httpoxy) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0243-1.NASL description This update for python3 fixes the following issues : Security issue fixed : CVE-2019-5010: Fixed a denial-of-service vulnerability in the X509 certificate parser (bsc#1122191) CVE-2018-20406: Fixed a integer overflow via a large LONG_BINPUT (bsc#1120644) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-18 modified 2019-02-06 plugin id 121616 published 2019-02-06 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121616 title SUSE SLED12 / SLES12 Security Update : python3 (SUSE-SU-2019:0243-1)
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References
- https://github.com/python/cpython/commit/a4ae828ee416a66d8c7bf5ee71d653c2cc6a26dd
- https://bugs.python.org/issue34656
- https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
- https://security.netapp.com/advisory/ntap-20190416-0010/
- https://usn.ubuntu.com/4127-2/
- https://usn.ubuntu.com/4127-1/
- https://access.redhat.com/errata/RHSA-2019:3725
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JSKPGPZQNTAULHW4UH63KGOOUIDE4RRB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D3LXPABKVLFYUHRYJPM3CSS5MS6FXKS7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AEZ5IQT7OF7Q2NCGIVABOWYGKO7YU3NJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICBEGRHIPHWPG2VGYS6R4EVKVUUF4AQW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TR6GCO3WTV4D5L23WTCBF275VE6BVNI3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/46PVWY5LFP4BRPG3BVQ5QEEFYBVEXHCK/