SB2018113018 - Fedora 29 update for perl
Published: November 30, 2018 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Integer overflow (CVE-ID: CVE-2018-18311)
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in Perl_my_setenv when processing malicious input. A remote unauthenticated attacker can supply specially crafted data, trigger heap-based buffer overflow and cause the service to crash or execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Out-of-bounds write (CVE-ID: CVE-2018-18312)
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists due to heap-based buffer overflow write during compilation. A remote unauthenticated attacker can supply specially crafted regular expression, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Heap-based buffer overflow (CVE-ID: CVE-2018-18313)
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The vulnerability exists due to heap-based buffer overflow read during compilation. A remote unauthenticated attacker can supply specially crafted regular expression, trigger memory leak and gain access to arbitrary data.
4) Heap-based buffer overflow (CVE-ID: CVE-2018-18314)
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists due to heap-based buffer overflow when processing malicious input. A remote unauthenticated attacker can supply specially crafted regular expression, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.