Security vulnerabilities in version 0.3.9.2

This page lists all known and fixed security vulnerabilities in version 0.3.9.2 (back to the list of all versions).

Overview: 7 vulnerabilities

WSA CVE Score Severity Issue Vulnerability type Scope Versions Fix Release date
WSA-2020-3 CVE-2020-9760 7.5
Buffer overflow on new IRC message 005 with nick prefixes. Out-of-bounds write IRC 0.3.4 → 2.7 2.7.1
WSA-2020-1 CVE-2020-8955 7.5
Buffer overflow on malformed IRC message 324 (channel mode). Out-of-bounds write IRC 0.3.8 → 2.7 2.7.1
WSA-2017-2 CVE-2017-14727 7.5
Use of invalid pointer in build of log filename. Access of uninitialized pointer Logger 0.3.2 → 1.9 1.9.1
WSA-2017-1 CVE-2017-8073 7.5
Buffer overflow when receiving a DCC file. Out-of-bounds write IRC 0.3.3 → 1.7 1.7.1
WSA-2013-3 - 7.5
Crash on IRC commands sent via Relay. Access of uninitialized pointer Relay 0.3.8 → 0.4.0 0.4.1
WSA-2013-2 - 5.5
Crash on send of unknown commands to IRC server. Access of uninitialized pointer IRC 0.3.0 → 0.4.0 0.4.1
WSA-2013-1 - 5.5
Crash on nicks monitored with /notify. Access of uninitialized pointer IRC 0.3.6 → 0.4.0 0.4.1

WSA-2020-3: [IRC] Buffer overflow on new IRC message 005 with nick prefixes.

Vulnerability
CVE
CVE-2020-9760 [ MITRE / NVD ]
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (detail)
CVSS score
7.5 / 10
Severity
high
Vulnerability type
Out-of-bounds write (detail)
Scope
IRC
Affected versions
0.3.4 → 2.7
Fixed version
2.7.1 () - ChangeLog
Tracker
Not available
Commits
Commit
Description
A buffer overflow happens when a new IRC message 005 is received with longer nick prefixes.
Note: a "normal" IRC server should not send again a message 005 with new nick prefixes, so the problem should be limited to malicious IRC servers.
Mitigation
There is no known mitigation.
The upgrade of WeeChat to the latest stable version is highly recommended.
Credit
The issue was discovered by Stuart Nevans Locke.

WSA-2020-1: [IRC] Buffer overflow on malformed IRC message 324 (channel mode).

Vulnerability
CVE
CVE-2020-8955 [ MITRE / NVD ]
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (detail)
CVSS score
7.5 / 10
Severity
high
Vulnerability type
Out-of-bounds write (detail)
Scope
IRC
Affected versions
0.3.8 → 2.7
Fixed version
2.7.1 () - ChangeLog
Tracker
Not available
Commits
Commit
Description
Buffer overflow when receiving a malformed IRC message 324 (channel mode).
Mitigation
There is no known mitigation.
The upgrade of WeeChat to the latest stable version is highly recommended.
Credit
The issue was discovered by Stuart Nevans Locke.

WSA-2017-2: [Logger] Use of invalid pointer in build of log filename.

Vulnerability
CVE
CVE-2017-14727 [ MITRE / NVD ]
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (detail)
CVSS score
7.5 / 10
Severity
high
Vulnerability type
Access of uninitialized pointer (detail)
Scope
Logger
Affected versions
0.3.2 → 1.9
Fixed version
1.9.1 () - ChangeLog
Tracker
Not available
Commits
Commit
Description
Date/time conversion specifiers are expanded after replacing buffer local variables in name of log files. In some cases, this can lead to an error in function strftime and a crash caused by the use of an uninitialized buffer.
Mitigation
You can unload the logger plugin, thus stopping recording of all buffers: /plugin unload logger.
Credit
The issue was discovered by Joseph Bisch.

WSA-2017-1: [IRC] Buffer overflow when receiving a DCC file.

Vulnerability
CVE
CVE-2017-8073 [ MITRE / NVD ]
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (detail)
CVSS score
7.5 / 10
Severity
high
Vulnerability type
Out-of-bounds write (detail)
Scope
IRC
Affected versions
0.3.3 → 1.7
Fixed version
1.7.1 () - ChangeLog
Tracker
Not available
Commits
Commit
Description
Buffer overflow when removing quotes in DCC filename.
Mitigation
With WeeChat ≥ 1.1, you can create a trigger: 

/trigger add irc_dcc_quotes modifier "irc_in_privmsg" "${arguments} =~ ^[^ ]+ :${\x01}DCC SEND ${\x22} " "/.*//"

With any older version, there is no simple mitigation, you must upgrade WeeChat.
Credit
The issue was discovered by Tobias Stoeckmann.

WSA-2013-3: [Relay] Crash on IRC commands sent via Relay.

Vulnerability
CVE
Not available
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (detail)
CVSS score
7.5 / 10
Severity
high
Vulnerability type
Access of uninitialized pointer (detail)
Scope
Relay
Affected versions
0.3.8 → 0.4.0
Fixed version
0.4.1 () - ChangeLog
Tracker
Not available
Commits
Commit
Description
Strings are built with uncontrolled format when IRC commands are redirected by relay plugin. If the output or redirected command contains formatting chars like "%", this can lead to a crash of WeeChat.
Mitigation
You can remove all relays of type "irc", see /help relay.

WSA-2013-2: [IRC] Crash on send of unknown commands to IRC server.

Vulnerability
CVE
Not available
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (detail)
CVSS score
5.5 / 10
Severity
medium
Vulnerability type
Access of uninitialized pointer (detail)
Scope
IRC
Affected versions
0.3.0 → 0.4.0
Fixed version
0.4.1 () - ChangeLog
Tracker
Not available
Commits
Commit
Description
Strings are built with uncontrolled format when unknown IRC commands are sent to server, if option irc.network.send_unknown_commands is enabled.
Mitigation
There are multiple ways to mitigate this issue:

WSA-2013-1: [IRC] Crash on nicks monitored with /notify.

Vulnerability
CVE
Not available
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (detail)
CVSS score
5.5 / 10
Severity
medium
Vulnerability type
Access of uninitialized pointer (detail)
Scope
IRC
Affected versions
0.3.6 → 0.4.0
Fixed version
0.4.1 () - ChangeLog
Tracker
Not available
Commits
Commit
Description
Strings are built with uncontrolled format when nicks containing "%" are monitored with command /notify.
Mitigation
Do not use command /notify with nicks containing formatting chars like "%".

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