#VU40757 Resource management error in nbd - CVE-2013-7441

Vulnerability identifier: #VU40757

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-7441

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
nbd
Other software / Other software solutions

Vendor: nbd.sourceforge.net

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The modern style negotiation in Network Block Device (nbd-server) 2.9.22 through 3.3 allows remote attackers to cause a denial of service (root process termination) by (1) closing the connection during negotiation or (2) specifying a name for a non-existent export.

Mitigation
Install update from vendor's website.

Vulnerable software versions

nbd: 2.9.3 - 3.3

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External links
https://lists.opensuse.org/opensuse-updates/2015-06/msg00003.html
https://sourceforge.net/p/nbd/mailman/message/30410146/
https://www.debian.org/security/2015/dsa-3271
https://www.openwall.com/lists/oss-security/2015/05/19/6
https://www.openwall.com/lists/oss-security/2015/05/21/5
https://www.securityfocus.com/bid/74808
https://www.ubuntu.com/usn/USN-2676-1
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=781547
https://github.com/yoe/nbd/commit/741495cb08503fd32a9d22648e63b64390c601f4

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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.