Improper access restrictions in Apache Tapestry
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-27850 |
| CWE-ID | CWE-284 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Apache Tapestry Web applications / Modules and components for CMS |
| Vendor | Apache Foundation |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper access control
EUVDB-ID: #VU52713
Risk: Medium
CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C]
CVE-ID: CVE-2021-27850
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote attacker can bypass implemented security restrictions and download the "AppModule.class" file and obtain the HMAC secret key.
MitigationInstall updates from vendor's website.
Vulnerable software versionsApache Tapestry: 5.4 - 5.7.0
External linkshttp://lists.apache.org/thread.html/r237ff7f286bda31682c254550c1ebf92b0ec61329b32fbeb2d1c8751%40%3Cusers.tapestry.apache.org%3E
http://www.openwall.com/lists/oss-security/2021/04/15/1
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, a fully functional exploit for this vulnerability is available.
