Ubuntu update for tomcat7
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2019-0221 CVE-2020-9484 CVE-2021-25329 |
| CWE-ID | CWE-79 CWE-502 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. |
| Vulnerable software Subscribe |
Ubuntu Operating systems & Components / Operating system tomcat7 (Ubuntu package) Operating systems & Components / Operating system package or component libtomcat7-java (Ubuntu package) Operating systems & Components / Operating system package or component libservlet3.0-java (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Cross-site scripting
EUVDB-ID: #VU18638
Risk: Low
CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-0221
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: Yes
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within SSI printenv command, when parsing URI. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Example:
http://[host]/printenv.shtml?%3Cscript%3Ealert(%27xss%27)%3C/script%3EMitigation
Update the affected package tomcat7 to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 18.04
tomcat7 (Ubuntu package): before Ubuntu Pro
libtomcat7-java (Ubuntu package): before Ubuntu Pro
libservlet3.0-java (Ubuntu package): before Ubuntu Pro
External linkshttp://ubuntu.com/security/notices/USN-6908-1
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. However, proof of concept for this vulnerability is available.
2) Deserialization of Untrusted Data
EUVDB-ID: #VU28158
Risk: High
CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2020-9484
CWE-ID:
CWE-502 - Deserialization of Untrusted Data
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in uploaded files names. A remote attacker can pass specially crafted file name to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that the server is configured to use PersistenceManager with a FileStore and the attacker knows relative file path from storage location.
Update the affected package tomcat7 to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 18.04
tomcat7 (Ubuntu package): before Ubuntu Pro
libtomcat7-java (Ubuntu package): before Ubuntu Pro
libservlet3.0-java (Ubuntu package): before Ubuntu Pro
External linkshttp://ubuntu.com/security/notices/USN-6908-1
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. However, proof of concept for this vulnerability is available.
3) Deserialization of Untrusted Data
EUVDB-ID: #VU51012
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-25329
CWE-ID:
CWE-502 - Deserialization of Untrusted Data
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.
Note, the vulnerability exists due to incomplete fix for #VU28158 and requires a certain specific configuration.
Update the affected package tomcat7 to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 18.04
tomcat7 (Ubuntu package): before Ubuntu Pro
libtomcat7-java (Ubuntu package): before Ubuntu Pro
libservlet3.0-java (Ubuntu package): before Ubuntu Pro
External linkshttp://ubuntu.com/security/notices/USN-6908-1
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.
