SB2021081069 - Fedora 33 Modular update for perl-bootstrap

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Main Vulnerability Database SB2021081069

SB2021081069 - Fedora 33 Modular update for perl-bootstrap

Published: August 10, 2021

Security Bulletin ID SB2021081069
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Insecure library loading (CVE-ID: CVE-2021-36770)

CWE-ID: CWE-427 - Uncontrolled Search Path Element

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a logic error in the Encode.pm script. A local user can place a malicious library into the current working directory and escalate privileges on the system.


2) Privilege Escalation (CVE-ID: CVE-2016-1238)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a local user to obtain elevated privileges on the target system.

The vulnerability exists due to improper input validation. By sending and tricking the victim to load a specially crafted code a malicious user can cause arbitrary code execution that allows them to gain root privileges.

Successful exploitation of this vulnerability will result in arbitrary code execution that allows a local attacker to get elevated privilegs on the vulnerable system.




3) Insecure search path in perl5-porters (CVE-ID: CVE-2016-1238)

CWE-ID: CWE-427 - Uncontrolled Search Path Element

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to potentially elevate privileges.

The vulnerability exists due to Perl 5 module loads modules from the includes directory array ("@INC") in which the last element is the current directory ("."). A local attacker can place specially crafted modules into world-writable directory and trick the victim to run arbitrary script from this directory.

Successful exploitation of this vulnerability may allow a local attacker to obtain elevated privileges on the system.


Remediation

Install update from vendor's website.

References