Multiple vulnerabilities in Apache Flink
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-17518 CVE-2020-17519 |
| CWE-ID | CWE-22 CWE-200 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. |
| Vulnerable software Subscribe |
Flink Server applications / Database software |
| Vendor | Apache Foundation |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Path traversal
EUVDB-ID: #VU49272
Risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-17518
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: Yes
DescriptionThe vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences while uploading files via a REST handler. A remote user can send a specially crafted HTTP request with a modified HTTP header and upload files to an arbitrary location on the system.
Install update from vendor's website.
Vulnerable software versionsFlink: 1.5.1 - 1.11.2
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Information disclosure
EUVDB-ID: #VU49273
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-17519
CWE-ID:
CWE-200 - Information exposure
Exploit availability: Yes
DescriptionThe vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to application allows to read arbitrary files on the system of the JobManager through the REST interface of the JobManager process. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.
Install updates from vendor's website.
Vulnerable software versionsFlink: 1.11.0 - 1.11.2
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
