#VU42310 Information disclosure in Moodle - CVE-2013-4522

Vulnerability identifier: #VU42310

Vulnerability risk: Medium

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

CVE-ID: CVE-2013-4522

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Moodle
Web applications / Other software

Vendor: moodle.org

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send "Cache-Control: private" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Moodle: 1.1.1, 1.2 - 1.2.1, 1.3 - 1.3.4, 1.4.1 - 1.4.5, 1.5 - 1.5.3, 1.6 - 1.6.8, 1.7 - 1.7.6, 1.8 - 1.8.14, 1.9 - 1.9.18, 2.0 - 2.0.9, 2.1 - 2.1.10, 2.2 - 2.2.10, 2.3 - 2.3.9, 2.4 - 2.4.6, 2.5 - 2.5.2

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External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-38743
https://openwall.com/lists/oss-security/2013/11/25/1
https://moodle.org/mod/forum/discuss.php?d=244479

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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.