#VU44261 Cross-site scripting in BackupPC - CVE-2011-5081

Vulnerability identifier: #VU44261

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-5081

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BackupPC
Other software / Other software solutions

Vendor: CBARRATT

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in RestoreFile.pm in BackupPC 3.1.0, 3.2.1, and possibly other earlier versions when processing share parameter in a RestoreFile action to index.cgi. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BackupPC: 3.1.0 - 3.2.1

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External links
https://seclists.org/bugtraq/2011/Apr/266
https://secunia.com/advisories/44385
https://www.osvdb.org/72055
https://exchange.xforce.ibmcloud.com/vulnerabilities/67170
https://www.htbridge.ch/advisory/multiple_xss_vulnerabilities_in_backuppc.html

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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.