Open redirect in apache2 (Alpine package)

1) Open redirect

EUVDB-ID: #VU26527

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1927

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data in some "mod_rewrite" configurations. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

apache2 (Alpine package): 2.4.4-r0 - 2.4.41-r0

External links

http://git.alpinelinux.org/aports/commit/?id=70887376e8deea648f023181bbbe7d2ef17ed5af
http://git.alpinelinux.org/aports/commit/?id=97cc1daad59156e767936e4ea1762d331195f7eb
http://git.alpinelinux.org/aports/commit/?id=bf5b47113f932a4c66b1a85154514d24fd9e3f5b
http://git.alpinelinux.org/aports/commit/?id=d6095f7dc165058ba032d27622224dc4ed2a78cc
http://git.alpinelinux.org/aports/commit/?id=f9dbe36405c236b51c640ef3a59f0f14baeee18d

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.