Ubuntu update for libreoffice
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2022-26305 CVE-2022-26306 CVE-2022-26307 |
| CWE-ID | CWE-295 CWE-326 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Ubuntu Operating systems & Components / Operating system libreoffice (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Improper Certificate Validation
EUVDB-ID: #VU65760
Risk: Medium
CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2022-26305
CWE-ID:
CWE-295 - Improper Certificate Validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to improper certificate validation when checking signed macro attached to the document. A remote attacker can trick the victim to open a specially crafted file, bypass implemented security restrictions and execute arbitrary code on the system.
Update the affected package libreoffice to the latest version.
Vulnerable software versionsUbuntu: 20.04
libreoffice (Ubuntu package): before 1:6.4.7-0ubuntu0.20.04.5
CPE2.3- cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:libreoffice_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-5661-1
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) Inadequate Encryption Strength
EUVDB-ID: #VU65767
Risk: Low
CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-26306
CWE-ID:
CWE-326 - Inadequate Encryption Strength
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to LibreOffice uses a weak initialization vector for encrypting passwords for web connections in the user’s configuration database. A local user can decrypt victim's password.
MitigationUpdate the affected package libreoffice to the latest version.
Vulnerable software versionsUbuntu: 20.04
libreoffice (Ubuntu package): before 1:6.4.7-0ubuntu0.20.04.5
CPE2.3 External linkshttps://ubuntu.com/security/notices/USN-5661-1
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Inadequate Encryption Strength
EUVDB-ID: #VU65768
Risk: Low
CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-26307
CWE-ID:
CWE-326 - Inadequate Encryption Strength
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to LibreOffice uses a poor encoding of the master key for web connections in the user’s configuration database, resulting in weakening its entropy from 128 to 43 bits. A local user can decrypt victim's password. MitigationUpdate the affected package libreoffice to the latest version.
Vulnerable software versionsUbuntu: 20.04
libreoffice (Ubuntu package): before 1:6.4.7-0ubuntu0.20.04.5
CPE2.3 External linkshttps://ubuntu.com/security/notices/USN-5661-1
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
