Vulnerability identifier: #VU40527

Vulnerability risk: Medium

CVSSv3.1: 5.4 [AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2016-1231

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Fedora
Operating systems & Components / Operating system
Debian Linux
Operating systems & Components / Operating system
Prosody
Server applications / Mail servers

Vendor: Fedoraproject
Prosody
Debian

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the HTTP file-serving module (mod_http_files) in Prosody 0.9.x before 0.9.9. A remote authenticated attacker can send a specially crafted HTTP request and remote attackers to read arbitrary files via a . (dot dot) in an unspecified path.

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

Vulnerable software versions

Fedora: 22 - 23

Prosody: 0.9.0 - 23

Debian Linux: 0.9.0 - 23

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External links
http://blog.prosody.im/prosody-0-9-9-security-release/
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175829.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175868.html
http://www.debian.org/security/2016/dsa-3439
http://www.openwall.com/lists/oss-security/2016/01/08/5
http://prosody.im/issues/issue/520
http://prosody.im/security/advisory_20160108-1/

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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.