Buffer overflow in Stunnel

1) Buffer overflow

EUVDB-ID: #VU44782

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-2940

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

stunnel 4.40 and 4.41 might allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Stunnel: 4.40 - 4.41

External links

http://secunia.com/advisories/45705
http://securitytracker.com/id?1025959
http://stunnel.org/?page=sdf_ChangeLog
http://www.openwall.com/lists/oss-security/2011/08/19/18
http://www.openwall.com/lists/oss-security/2011/08/19/6
http://www.osvdb.org/74600
http://www.securityfocus.com/bid/49254
http://www.stunnel.org/pipermail/stunnel-announce/2011-August/000059.html
http://bugzilla.redhat.com/show_bug.cgi?id=732068
http://exchange.xforce.ibmcloud.com/vulnerabilities/69318

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.