SUSE update for libtasn1

1) Off-by-one

EUVDB-ID: #VU68858

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

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-ESPOS - 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

External links

http://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.