Ubuntu update for libtasn1-6



Published: 2022-03-28
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-1000654
CWE-ID CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		Ubuntu
Operating systems & Components / Operating system

libtasn1-6 (Ubuntu package)
Operating systems & Components / Operating system package or component

libtasn1-bin (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Input validation error

EUVDB-ID: #VU18290

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-1000654

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within the _asn1_expand_object_id(p_tree) function when parsing a specially crafted file with asn1Parser binary. An attacker can create a specially crafted file, pass it to the application and consume all available CPU resources on the system.

Mitigation

Update the affected package libtasn1-6 to the latest version.

Vulnerable software versions

Ubuntu: 16.04

libtasn1-6 (Ubuntu package): before 4.73u buntu0.16.04.3+esm2

libtasn1-bin (Ubuntu package): before 4.73u buntu0.16.04.3+esm2

External links

http://ubuntu.com/security/notices/USN-5352-1


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. However, proof of concept for this vulnerability is available.



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