Fedora 32 update for jetty



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-28163
CVE-2021-28164
CVE-2021-28165
CWE-ID CWE-200
CWE-20
CWE-400
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
 Fedora
Operating systems & Components / Operating system

jetty
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU51878

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-28163

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. If the ${jetty.base} directory or the ${jetty.base}/webapps directory is a symlink, the contents of the ${jetty.base}/webapps directory may be deployed as a static web application, exposing the content of the directory for download.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

jetty: before 9.4.40-1.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-444e38face


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) Input validation error

EUVDB-ID: #VU51877

Risk: Medium

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2021-28164

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain access to sensitive informatoin.

The vulnerability exists due to insufficient validation of user-supplied input when processing special characters, passed via URI. A remote attacker can use %2e or %2e%2e segments to access protected resources within the WEB-INF directory.

Example:

http://[host]/context/%2e/WEB-INF/web.xml

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

jetty: before 9.4.40-1.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-444e38face


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, a fully functional exploit for this vulnerability is available.

3) Resource exhaustion

EUVDB-ID: #VU51876

Risk: Medium

CVSSv4.0: 6.6 [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/E:U/U:Green]

CVE-ID: CVE-2021-28165

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when processing large TLS frames. A remote attacker can send specially crafted data to the server, trigger CPU high load and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

jetty: before 9.4.40-1.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-444e38face


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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