Ubuntu update for Irssi



Risk Low
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2018-5205
CVE-2018-5206
CVE-2018-5207
CVE-2018-5208
CWE-ID CWE-126
CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Buffer over-read

EUVDB-ID: #VU11471

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5205

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to data access beyond the end of the string when using incomplete escape codes. A remote attacker can trigger buffer over-read and gain access to potentially sensitive information.

Mitigation

Update the affected packages

Ubuntu 17.10:
irssi 1.0.4-1ubuntu2.2
Ubuntu 17.04:
irssi 0.8.20-2ubuntu2.3
Ubuntu 16.04 LTS:
irssi 0.8.19-1ubuntu1.6
Ubuntu 14.04 LTS:
irssi 0.8.15-5ubuntu3.4

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3527-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) NULL pointer dereference

EUVDB-ID: #VU11473

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5206

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to NULL pointer dereference when the channel topic is set without specifying a sender. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages

Ubuntu 17.10:
irssi 1.0.4-1ubuntu2.2
Ubuntu 17.04:
irssi 0.8.20-2ubuntu2.3
Ubuntu 16.04 LTS:
irssi 0.8.19-1ubuntu1.6
Ubuntu 14.04 LTS:
irssi 0.8.15-5ubuntu3.4

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3527-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Buffer over-read

EUVDB-ID: #VU11474

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5207

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to data access beyond the end of the string when using an incomplete variable argument. A remote attacker can trigger buffer over-read and gain access to potentially sensitive information.

Mitigation

Update the affected packages

Ubuntu 17.10:
irssi 1.0.4-1ubuntu2.2
Ubuntu 17.04:
irssi 0.8.20-2ubuntu2.3
Ubuntu 16.04 LTS:
irssi 0.8.19-1ubuntu1.6
Ubuntu 14.04 LTS:
irssi 0.8.15-5ubuntu3.4

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3527-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Buffer over-read

EUVDB-ID: #VU11475

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5208

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to a calculation error in the completion code that triggers heap buffer overflow when completing certain strings. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages

Ubuntu 17.10:
irssi 1.0.4-1ubuntu2.2
Ubuntu 17.04:
irssi 0.8.20-2ubuntu2.3
Ubuntu 16.04 LTS:
irssi 0.8.19-1ubuntu1.6
Ubuntu 14.04 LTS:
irssi 0.8.15-5ubuntu3.4

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3527-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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