SUSE update for libtasn1

1) Off-by-one

EUVDB-ID: #VU68858

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-46848

CWE-ID: CWE-193 - Off-by-one Error

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an ETYPE_OK off-by-one error in asn1_encode_simple_der in Libtasn1. A remote attacker can pass specially crafted data to the application, trigger an off-by-one error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package libtasn1 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro: 5.1 - 5.3

openSUSE Leap Micro: 5.2

SUSE Enterprise Storage: 6 - 7.1

SUSE Manager Retail Branch Server: 4.1 - 4.3

SUSE Linux Enterprise Storage: 7.1

SUSE Manager Server: 4.1 - 4.3

SUSE Manager Proxy: 4.1 - 4.3

SUSE Linux Enterprise Server for SAP: 15-SP1 - 15-SP2

SUSE Linux Enterprise Server: 15-LTSS - 15-SP4

SUSE Linux Enterprise Module for Basesystem: 15-SP3 - 15-SP4

SUSE Linux Enterprise High Performance Computing: 15-LTSS - 15-SP4

SUSE Linux Enterprise Desktop: 15-SP3 - 15-SP4

SUSE CaaS Platform: 4.0

openSUSE Leap: 15.3 - 15.4

SUSE Linux Enterprise Server for SAP Applications: 15-SP3 - 15-SP4

libtasn1-devel-32bit: before 4.13-150000.4.8.1

libtasn1-6-32bit-debuginfo: before 4.13-150000.4.8.1

libtasn1-6-32bit: before 4.13-150000.4.8.1

libtasn1-devel: before 4.13-150000.4.8.1

libtasn1-debugsource: before 4.13-150000.4.8.1

libtasn1-debuginfo: before 4.13-150000.4.8.1

libtasn1-6-debuginfo: before 4.13-150000.4.8.1

libtasn1-6: before 4.13-150000.4.8.1

libtasn1: before 4.13-150000.4.8.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:opensuse_leap_micro:5.2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_enterprise_storage:6:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_enterprise_storage:7.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_storage:7.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_server:4.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_proxy:4.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap:15-SP1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:15-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_desktop:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_caas_platform:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:suse:opensuse_leap:15.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:libtasn1-devel-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-6-32bit-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-6-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-6-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-6:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20223784-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.