SB2022020446 - Ubuntu update for weechat

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2022020446

SB2022020446 - Ubuntu update for weechat

Published: February 4, 2022 Updated: October 31, 2026

Security Bulletin ID SB2022020446
CSH Severity
High
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 20% Medium 60% Low 20%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Improper input validation (CVE-ID: CVE-2017-14727)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [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]


The vulnerability allows a remote attacker to crash the affected messaging client.

The vulnerability exists due to an error when processing Date/time conversion specifiers in logger.c file (logger plugin) during log file creation. A remote attacker can send a specially crafted message and crash the affected client.


2) Buffer overflow (CVE-ID: CVE-2020-8955)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 9.3 [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]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing IRC messages in irc_mode_channel_update() function in plugins/irc/irc-mode.c in WeeChat. A remote attacker can send a specially crafted IRC message 324 (channel mode), trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


3) NULL pointer dereference (CVE-ID: CVE-2020-9759)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 8.7 [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]


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the "callback" function. A remote attacker can send a specially crafted message 352 (who) and perform a denial of service (DoS) attack.


4) Buffer overflow (CVE-ID: CVE-2020-9760)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 8.7 [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]


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when a new IRC message 005 is received with longer nick prefixes. A remote attacker can send a specially crafted message 005, trigger memory corruption and cause a denial of service condition on the target system when a new mode is set for a nick.


5) Out-of-bounds read (CVE-ID: CVE-2021-40516)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 8.7 [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]


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in plugins/relay/relay-websocket.c in the Relay plugin. A remote attacker can trigger out-of-bounds read error and cause a denial of service condition on the system.


Remediation

Install update from vendor's website.

References