CVE-2020-10735

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Summary

CVECVE-2020-10735
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-09-09 14:15:08 UTC
Updated2026-10-14 09:17:17 UTC
DescriptionA flaw was found in python. In algorithms with quadratic time complexity using non-binary bases, when using int("text"), a system could take 50ms to parse an int string with 100,000 digits and 5s for 1,000,000 digits (float, decimal, int.from_bytes(), and int() for binary bases 2, 4, 8, 16, and 32 are not affected). The highest threat from this vulnerability is to system availability.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-704 | DoS | CWE-704 CWE-704 Incorrect Type Conversion or Cast

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1ADPDECLARED6.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Python Python All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Python affected python 3.7 Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
[1-pager] CPython int string conversion limit for CVE-2020-10735 DoS - Google Docs af854a3a-2127-422b-91ae-364da2661108 docs.google.com Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] Fedora 37 Update: python3-docs-3.11.0~rc2-1.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.7-3.7.14-1.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
CVE-2020-10735: Prevent DoS by large int<->str conversions · Issue #95778 · python/cpython · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
Red Hat Customer Portal - Access to 24x7 support and knowledge af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
[SECURITY] Fedora 35 Update: python3.7-3.7.14-1.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
lists.debian.org/debian-lts-announce/2024/12/msg00000.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
[SECURITY] Fedora 37 Update: python3.8-3.8.14-1.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.11-3.11.0~rc2-1.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] [DLA 3477-1] python3.7 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
[SECURITY] Fedora 36 Update: python3-docs-3.10.7-1.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.9-3.9.14-1.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
1834423 – (CVE-2020-10735) CVE-2020-10735 python: int() type in PyLong_FromString() does not limit amount of digits converting text to int leading to DoS af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
[SECURITY] Fedora 35 Update: python3-docs-3.10.7-1.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.8-3.8.14-1.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.9-3.9.14-1.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3.7-3.7.14-1.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.6-3.6.15-6.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
lists.debian.org/debian-lts-announce/2024/11/msg00024.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
[SECURITY] Fedora 35 Update: python3.11-3.11.0~rc2-1.fc35 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
oss-security - Re: big ints in python: CVE-2020-10735 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
[SECURITY] Fedora 37 Update: python3.6-3.6.15-13.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
cert-portal.siemens.com/productcert/html/ssa-806742.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] Fedora 37 Update: python3.10-3.10.7-1.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3.9-3.9.14-1.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.8-3.8.14-1.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.6-3.6.15-12.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 36 Update: mingw-python3-3.10.8-1.fc36 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 37 Update: mingw-python3-3.10.8-1.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
oss-security - big ints in python: CVE-2020-10735 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Third Party Advisory
[SECURITY] Fedora 36 Update: python3.11-3.11.0~rc2-1.fc36 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.11-3.11.0~rc2-1.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.8-3.8.14-1.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.9-3.9.14-1.fc36 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.7-3.7.14-1.fc36 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.8-3.8.14-1.fc36 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3.9-3.9.14-1.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3-docs-3.11.0~rc2-1.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: mingw-python3-3.10.8-1.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.7-3.7.14-1.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3.6-3.6.15-13.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3-docs-3.10.7-1.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3.7-3.7.14-1.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.6-3.6.15-6.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3-docs-3.10.7-1.fc36 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 36 Update: mingw-python3-3.10.8-1.fc36 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 36 Update: python3.6-3.6.15-12.fc36 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3.8-3.8.14-1.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 37 Update: python3.10-3.10.7-1.fc37 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 35 Update: python3.9-3.9.14-1.fc35 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
Red Hat Customer Portal - Access to 24x7 support and knowledge MITRE access.redhat.com
Red Hat Customer Portal - Access to 24x7 support and knowledge MITRE access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 160193 Oracle Enterprise Linux Security Update for python3.9 (ELSA-2022-7323)
  • 160473 Oracle Enterprise Linux Security Update for python3 (ELSA-2023-0833)
  • 160651 Oracle Enterprise Linux Security Update for python38:3.8 and python38-devel:3.8 (ELSA-2023-2763)
  • 160687 Oracle Enterprise Linux Security Update for python39:3.9 and python39-devel:3.9 (ELSA-2023-2764)
  • 20317 Oracle Database 21c Critical Patch Update - January 2023
  • 240700 Red Hat Update for rh-python38-python (RHSA-2022:6766)
  • 240802 Red Hat Update for python3.9 (RHSA-2022:7323)
  • 241211 Red Hat Update for python3 (RHSA-2023:0833)
  • 241481 Red Hat Update for python38:3.8 and python38-devel:3.8 (RHSA-2023:2763)
  • 241507 Red Hat Update for python39:3.9 and python39-devel:3.9 (RHSA-2023:2764)
  • 242742 Red Hat Update for python3 (RHSA-2024:0430)
  • 283104 Fedora Security Update for python3.9 (FEDORA-2022-46a44a7f83)
  • 283105 Fedora Security Update for python3.8 (FEDORA-2022-66b65beccb)
  • 283106 Fedora Security Update for python3.7 (FEDORA-2022-4b31e33ed0)
  • 283111 Fedora Security Update for python3.8 (FEDORA-2022-29d436596f)
  • 283112 Fedora Security Update for python3.7 (FEDORA-2022-8535093cba)
  • 283139 Fedora Security Update for python3.9 (FEDORA-2022-f511f8f58b)
  • 283142 Fedora Security Update for python3.11 (FEDORA-2022-0b3904c674)
  • 283143 Fedora Security Update for python (FEDORA-2022-c072cdc3c8)
  • 283147 Fedora Security Update for python3.11 (FEDORA-2022-141f632a6f)
  • 283148 Fedora Security Update for python3 (FEDORA-2022-ac82a548df)
  • 283214 Fedora Security Update for python3.6 (FEDORA-2022-d4570fc1a6)
  • 283215 Fedora Security Update for python3.6 (FEDORA-2022-b8b34e62ab)
  • 283294 Fedora Security Update for mingw (FEDORA-2022-d1682fef04)
  • 283444 Fedora Security Update for mingw (FEDORA-2022-79843dfb3c)
  • 296086 Oracle Solaris 11.4 Support Repository Update (SRU) 51.132.1 Missing (CPUOCT2022)
  • 330125 IBM AIX Multiple Vulnerabilities in Python (python_advisory2)
  • 354119 Amazon Linux Security Advisory for python3 : ALAS2-2022-1896
  • 354485 Amazon Linux Security Advisory for python3.10 : ALAS2022-2022-212
  • 354541 Amazon Linux Security Advisory for python3.10 : ALAS-2022-212
  • 355271 Amazon Linux Security Advisory for python3.9 : ALAS2023-2023-116
  • 356200 Amazon Linux Security Advisory for python38 : ALASPYTHON3.8-2023-007
  • 356500 Amazon Linux Security Advisory for python38 : ALAS2PYTHON3.8-2023-007
  • 377909 Oracle PeopleSoft Enterprise PeopleTools Product Multiple Vulnerabilities (CPUJAN2023)
  • 6000019 Debian Security Update for python3.7 (DLA 3477-1)
  • 672343 EulerOS Security Update for python3 (EulerOS-SA-2022-2773)
  • 672368 EulerOS Security Update for python3 (EulerOS-SA-2022-2738)
  • 672399 EulerOS Security Update for python3 (EulerOS-SA-2022-2805)
  • 672427 EulerOS Security Update for python3 (EulerOS-SA-2022-2827)
  • 672460 EulerOS Security Update for python3 (EulerOS-SA-2022-2853)
  • 690936 Free Berkeley Software Distribution (FreeBSD) Security Update for python (80e057e7-2f0a-11ed-978f-fcaa147e860e)
  • 752643 SUSE Enterprise Linux Security Update for python39 (SUSE-SU-2022:3485-1)
  • 752779 SUSE Enterprise Linux Security Update for python3 (SUSE-SU-2022:3924-1)
  • 752921 SUSE Enterprise Linux Security Update for python3 (SUSE-SU-2022:4251-1)
  • 752940 SUSE Enterprise Linux Security Update for python3 (SUSE-SU-2022:4274-1)
  • 752957 SUSE Enterprise Linux Security Update for python3 (SUSE-SU-2022:4281-1)
  • 905249 Common Base Linux Mariner (CBL-Mariner) Security Update for python3 (12982)
  • 906965 Common Base Linux Mariner (CBL-Mariner) Security Update for python3 (12982-1)
  • 940727 AlmaLinux Security Update for python3.9 (ALSA-2022:7323)
  • 940928 AlmaLinux Security Update for python3 (ALSA-2023:0833)
  • 941099 AlmaLinux Security Update for python39:3.9 and python39-devel:3.9 (ALSA-2023:2764)
  • 941101 AlmaLinux Security Update for python38:3.8 and python38-devel:3.8 (ALSA-2023:2763)
  • 960557 Rocky Linux Security Update for python3.9 (RLSA-2022:7323)
  • 960653 Rocky Linux Security Update for python3 (RLSA-2023:0833)

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