Cross-site scripting in php5 (Alpine package)

1) Cross-site scripting

EUVDB-ID: #VU12327

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10547

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists in the phar_do_404() and phar_do_403() functions due to insufficient sanitization of user-supplied data processed by the phar_do_404() and phar_do_403() functions, as defined in the ext/phar/phar_object.c source code file. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

The vulnerability exists due to an incomplete fix for CVE-2018-5712.

Mitigation

Install update from vendor's website.

Vulnerable software versions

php5 (Alpine package): 5.6.30-r0 - 5.6.40-r0

CPE2.3

• cpe:2.3:a:alpine:php5_alpine_package:5.6.30-r0:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:a:alpine:php5_alpine_package:5.6.30-r1:*:*:*:*:alpine_linux:*:3.5
• cpe:2.3:a:alpine:php5_alpine_package:5.6.30-r2:*:*:*:*:alpine_linux:*:3.5

External links

https://git.alpinelinux.org/aports/commit/?id=f86eadb4774f574b4817a9478d105e6e46086409

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.