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 OpenStack Cloud Crowbar: 9

SUSE Linux Enterprise Software Development Kit: 12-SP5

SUSE Linux Enterprise Server for SAP: 12-SP4

SUSE Linux Enterprise Server for SAP Applications: 12-SP5

SUSE Linux Enterprise Server: 12-SP3-BCL - 12-SP5

SUSE OpenStack Cloud: 9

libtasn1-devel: before 4.9-3.13.1

libtasn1-debugsource: before 4.9-3.13.1

libtasn1-debuginfo: before 4.9-3.13.1

libtasn1-6-debuginfo: before 4.9-3.13.1

libtasn1-6-debuginfo-32bit: before 4.9-3.13.1

libtasn1-6: before 4.9-3.13.1

libtasn1-6-32bit: before 4.9-3.13.1

libtasn1: before 4.9-3.13.1

CPE2.3

• cpe:2.3:o:suse:suse_openstack_cloud_crowbar:9:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_software_development_kit:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap:12-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP3-BCL:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP4-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_openstack_cloud:9:*:*:*:*:*:*:*
• 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-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-6:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1-6-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libtasn1:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20223817-1/

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.