SB2026072867 - Multiple vulnerabilities in WeeChat

Description

This security bulletin contains information about 3 vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: N/A)

CWE-ID: CWE-121 - Stack-based buffer overflow

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

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a boundary error in the "irc_message_split_join" function. A remote attacker can trigger stack-based buffer overflow and perform a denial of service (DoS) attack on the system.

2) Double free (CVE-ID: N/A)

CWE-ID: CWE-415 - Double Free

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

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to a boundary error in the relay_remote_event_recv() function. A remote attacker can pass specially crafted data to the application, trigger double free error and perform a denial of service (DoS) attack on the system.

3) Use-after-free (CVE-ID: N/A)

CWE-ID: CWE-416 - Use After Free

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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the irc plugin when a batched message disconnects the server. A remote attacker can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://github.com/weechat/weechat/security/advisories/GHSA-q2xg-9ggx-77mr
• https://github.com/weechat/weechat/security/advisories/GHSA-hx59-4hq9-6vmw
• https://github.com/weechat/weechat/security/advisories/GHSA-rfmh-3r7f-jpx5