SB2018021634 - Fedora 26 update for irssi
Published: February 16, 2018 Updated: April 24, 2025
Security Bulletin ID
SB2018021634
Severity
High
Patch available
YES
Number of vulnerabilities
5
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) NULL pointer dereference (CVE-ID: CVE-2018-7050)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to a NULL pointer dereference when an "empty" nick has been observed. A remote attacker can use a broken ircd or control over the ircde and cause the service to crash.
2) Out-of-bounds write (CVE-ID: CVE-2018-7051)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to an out-of-bounds write error when printing theme strings. A remote attacker can execute arbitrary code on the system.
Successful exploitation of the vulnerability may result in system compromise.
3) NULL pointer dereference (CVE-ID: CVE-2018-7052)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to a NULL pointer dereference when the number of windows exceed the available space. A remote attacker can cause a denial of service.
4) Use-after-free error (CVE-ID: CVE-2018-7053)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists due to a use-after-free when SASL messages are received in unexpected order. A remote attacker can use a non-conforming ircd, trigger memory corruption and execute arbitrary code on the system.
Successful exploitation of the vulnerability may result in system compromise.
5) Use-after-free error (CVE-ID: CVE-2018-7054)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness is due to a use-after-free when server is disconnected during netsplits. A remote attacker can trigger memory corruption and execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
Remediation
Install update from vendor's website.