SB2018021634 - Fedora 26 update for irssi
Published: February 16, 2018 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) NULL pointer dereference (CVE-ID: CVE-2018-7050)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
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)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
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)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
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)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
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)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
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.