Remote code execution in Backdrop Archive_Tar pear library
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-32610 |
| CWE-ID | CWE-59 |
| Exploitation vector | Network |
| Public exploit | This vulnerability is being exploited in the wild. |
| Vulnerable software Subscribe |
Backdrop CMS Web applications / CMS |
| Vendor | Backdrop CMS |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Link following
EUVDB-ID: #VU55101
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-32610
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to the application does not check if the file in the archive is a symbolic link when extracting it. A remote attacker can pass a specially crafted file to the application and overwrite arbitrary files on the system. Successful exploitation of the vulnerability may allow an attacker to compromise the affected system.
Install update from vendor's website.
Vulnerable software versionsBackdrop CMS: 1.0.0 - 1.19.1
External linkshttp://backdropcms.org/security/backdrop-sa-core-2021-004
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.
