CVE-2020-13757

Upstream information

CVE-2020-13757 at MITRE

Description

Python-RSA before 4.1 ignores leading '\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation).

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SUSE information

Overall state of this security issue: Running

This issue is currently rated as having important severity.

CVSS v2 Scores

	National Vulnerability Database
Base Score	5
Vector	AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector	Network
Access Complexity	Low
Authentication	None
Confidentiality Impact	Partial
Integrity Impact	None
Availability Impact	None

CVSS v3 Scores

	National Vulnerability Database	SUSE
Base Score	7.5	7.5
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Access Vector	Network	Network
Access Complexity	Low	Low
Privileges Required	None	None
User Interaction	None	None
Scope	Unchanged	Unchanged
Confidentiality Impact	High	High
Integrity Impact	None	None
Availability Impact	None	None
CVSSv3 Version	3.1	3.1

SUSE Bugzilla entry: 1172389 [NEW]

SUSE Security Advisories:

• SUSE-CU-2021:254-1, published Fri Jul 2 06:05:25 UTC 2021
• SUSE-CU-2021:257-1, published Thu Jul 8 06:05:45 UTC 2021
• SUSE-CU-2021:265-1, published Wed Jul 21 06:10:24 UTC 2021
• SUSE-CU-2021:494-1, published Tue Nov 9 07:27:15 UTC 2021
• SUSE-CU-2021:495-1, published Tue Nov 9 07:30:11 UTC 2021
• SUSE-CU-2021:496-1, published Tue Nov 9 07:33:09 UTC 2021
• SUSE-SU-2021:2008-1, published Thu Jun 17 19:18:42 UTC 2021
• SUSE-SU-2021:2237-1, published Fri Jul 2 19:21:39 UTC 2021
• SUSE-SU-2021:2253-1, published Tue Jul 6 10:16:40 UTC 2021
• openSUSE-SU-2021:0901-1, published Thu Jun 24 00:39:45 2021
• openSUSE-SU-2021:2008-1, published Mon Jul 12 18:41:03 2021

List of released packages

Product(s)	Fixed package version(s)	References
Image caasp4/caasp-k8s-sidecar-image Image caasp45/caasp-k8s-sidecar-image	python3-rsa >= 3.4.2-3.4.1
SUSE CaaS Platform 4.0	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SUSE-CAASP-4.0-2021-2008
SUSE Enterprise Storage 6	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-Storage-6-2021-2008
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-HPC-15-SP1-ESPOS-2021-2008
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-HPC-15-SP1-LTSS-2021-2008
SUSE Linux Enterprise Module for Basesystem 15 SP2	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Module-Basesystem-15-SP2-2021-2008
SUSE Linux Enterprise Module for Basesystem 15 SP3	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Module-Basesystem-15-SP3-2021-2008
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2	python2-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Module-Development-Tools-OBS-15-SP2-2021-2008
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP3	python2-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Module-Development-Tools-OBS-15-SP3-2021-2008
SUSE Linux Enterprise Module for Public Cloud 12	python-rsa >= 3.1.4-12.16.1	Patchnames: SUSE-SLE-Module-Public-Cloud-12-2021-2237
SUSE Linux Enterprise Module for Public Cloud 15	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Module-Public-Cloud-15-2021-2008
SUSE Linux Enterprise Module for additional PackageHub packages 15 SP2	python2-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Module-Packagehub-Subpackages-15-SP2-2021-2008
SUSE Linux Enterprise Module for additional PackageHub packages 15 SP3	python2-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Module-Packagehub-Subpackages-15-SP3-2021-2008
SUSE Linux Enterprise Server 15 SP1-BCL	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-SLES-15-SP1-BCL-2021-2008
SUSE Linux Enterprise Server 15 SP1-LTSS	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-SLES-15-SP1-LTSS-2021-2008
SUSE Linux Enterprise Server for SAP Applications 15 SP1	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP1-2021-2008
SUSE Manager Proxy 4.0	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-SUSE-Manager-Proxy-4.0-2021-2008
SUSE Manager Retail Branch Server 4.0	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.0-2021-2008
SUSE Manager Server 4.0	python3-rsa >= 3.4.2-3.4.1	Patchnames: SUSE-SLE-Product-SUSE-Manager-Server-4.0-2021-2008
SUSE OpenStack Cloud 7	python-rsa >= 3.1.4-12.16.1	Patchnames: SUSE-OpenStack-Cloud-7-2021-2237
SUSE OpenStack Cloud 9	python-rsa >= 3.4.2-4.4.1	Patchnames: SUSE-OpenStack-Cloud-9-2021-2253
SUSE OpenStack Cloud Crowbar 9	python-rsa >= 3.4.2-4.4.1	Patchnames: SUSE-OpenStack-Cloud-Crowbar-9-2021-2253
openSUSE Leap 15.2	python2-rsa >= 3.4.2-lp152.4.3.1 python3-rsa >= 3.4.2-lp152.4.3.1	Patchnames: openSUSE-2021-901
openSUSE Leap 15.3	python2-rsa >= 3.4.2-3.4.1 python3-rsa >= 3.4.2-3.4.1	Patchnames: openSUSE-SLE-15.3-2021-2008
openSUSE Tumbleweed	python36-rsa >= 4.7.2-1.5 python38-rsa >= 4.7.2-1.5 python39-rsa >= 4.7.2-1.5	Patchnames: openSUSE Tumbleweed GA python36-rsa-4.7.2-1.5

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First public cloud image revisions this CVE is fixed in:

• amazon/suse-manager-4-1-proxy-byos-v20210906-hvm-ssd-x86_64
• amazon/suse-manager-4-1-server-byos-v20210905-hvm-ssd-x86_64
• amazon/suse-manager-4-2-proxy-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-manager-4-2-server-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-12-sp5-byos-v20210905-hvm-ssd-x86_64
• amazon/suse-sles-12-sp5-v20210907-ecs-hvm-ssd-x86_64
• amazon/suse-sles-12-sp5-v20210907-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-byos-v20210924-hvm-ssd-arm64
• amazon/suse-sles-15-sp3-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-v20210924-ecs-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-v20210924-hvm-ssd-arm64
• amazon/suse-sles-15-sp3-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-hpc-15-sp3-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-sap-12-sp5-byos-v20210906-hvm-ssd-x86_64
• amazon/suse-sles-sap-15-sp3-byos-v20210924-hvm-ssd-x86_64
• google/sles-15-sp3-sap-byos-v20210812
• google/sles-15-sp3-sap-v20210812

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Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s)	Source package	State
HPE Helion OpenStack 8	python-rsa	Affected
HPE Helion OpenStack Cloud 8	python-rsa	Affected
SUSE CaaS Platform 4.0	python-rsa	Released
SUSE Container as a Service Platform 1.0	python-rsa	Affected
SUSE Container as a Service Platform 2.0	python-rsa	Affected
SUSE Enterprise Storage 5	python-rsa	Unsupported
SUSE Enterprise Storage 6	python-rsa	Released
SUSE Linux Enterprise High Performance Computing 15 SP1 ESPOS	python-rsa	Released
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS	python-rsa	Released
SUSE Linux Enterprise Module for Basesystem 15 SP1	python-rsa	Unsupported
SUSE Linux Enterprise Module for Basesystem 15 SP2	python-rsa	Released
SUSE Linux Enterprise Module for Basesystem 15 SP3	python-rsa	Released
SUSE Linux Enterprise Module for Public Cloud 12	python-rsa	Released
SUSE Linux Enterprise Module for Public Cloud 15	python-rsa	Released
SUSE Linux Enterprise Server 15 SP1 LTSS	python-rsa	Released
SUSE Linux Enterprise Server Business Critical Linux 15 SP1	python-rsa	Released
SUSE Linux Enterprise Server for SAP Applications 15 SP1	python-rsa	Released
SUSE Manager Proxy 4.0	python-rsa	Released
SUSE Manager Retail Branch Server 4.0	python-rsa	Released
SUSE Manager Server 3.2	python-rsa	Affected
SUSE Manager Server 4.0	python-rsa	Released
SUSE OpenStack Cloud 6 LTSS	python-rsa	Unsupported
SUSE OpenStack Cloud 7	python-rsa	In progress
SUSE OpenStack Cloud 8	python-rsa	Affected
SUSE OpenStack Cloud 9	python-rsa	Released
SUSE OpenStack Cloud Crowbar 8	python-rsa	Affected
SUSE OpenStack Cloud Crowbar 9	python-rsa	Released
SUSE Package Hub 15	python-rsa	Released
SUSE Package Hub 15 SP1	python-rsa	Released
SUSE Package Hub 15 SP2	python-rsa	Released
SUSE Package Hub 15 SP3	python-rsa	Released