SB2019060502 - OpenSUSE Linux update for libtasn1
Published: June 5, 2019
Security Bulletin ID
SB2019060502
Severity
Medium
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2017-6891)
A remote attacker can execute arbitrary code on the target system.The vulnerability exists due to a boundary error in "asn1_find_node()" function (lib/parser_aux.c) within GnuTLS libtasn1 version 4.10 when processing a specially crafted assignments file via the e.g. asn1Coding utility. A remote attacker can trick the victim into opening a specially crafted file, trigger stack-based buffer overflow and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
2) Input validation error (CVE-ID: CVE-2018-1000654)
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.
Remediation
Install update from vendor's website.