Input validation error in php7 (Alpine package)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-7070 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
php7 (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU47252
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-7070
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a spoofing attack.
The vulnerability exists in the way PHP parser handles cookies with percent character (e.g. '%'). A remote attacker can send a crafted HTTP request with a `__%48ost-` or `__%53ecure-` cookie that will be processed before other cookies sent in the same request. As a result, an attacker can set malicious `__Host-` cookie on a subdomain and bypass origin restrictions, imposed by browsers.
Successful exploitation of the vulnerability may allow an attacker to perform a spoofing attack.
Install update from vendor's website.
Vulnerable software versionsphp7 (Alpine package): 7.2.5-r0 - 7.4.10-r2
External linkshttp://git.alpinelinux.org/aports/commit/?id=fea14b992879a919d81e6500b16721f9ecf084b7
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.
