Vulnerability Monitor

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CVE-2012-0920

Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to "channels concurrency."

Security Impact Summary

CVE-2012-0920 is a security vulnerability that . Impacting 2 products from dropbear_ssh_project, from debian organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2012, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2012-06-05T22:55:09.437

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 7.1 (HIGH)

CVSSv2 Vector

AV:N/AC:H/Au:S/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: HIGH
Authentication: SINGLE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-399

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	dropbear_ssh_project	dropbear_ssh	≤ 2012.54	Yes
Operating System	debian	debian_linux	6.0	Yes
Operating System	debian	debian_linux	7.0	Yes

References

http://matt.ucc.asn.au/dropbear/CHANGES Vendor Advisory ([email protected])
http://secunia.com/advisories/48147 Third Party Advisory ([email protected])
http://secunia.com/advisories/48929 Third Party Advisory ([email protected])
http://www.debian.org/security/2012/dsa-2456 Third Party Advisory ([email protected])
http://www.osvdb.org/79590 Broken Link ([email protected])
http://www.securityfocus.com/bid/52159 Third Party Advisory, VDB Entry ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/73444 Third Party Advisory, VDB Entry ([email protected])
https://secure.ucc.asn.au/hg/dropbear/rev/818108bf7749 Vendor Advisory ([email protected])
https://www.mantor.org/~northox/misc/CVE-2012-0920.html Third Party Advisory ([email protected])
http://matt.ucc.asn.au/dropbear/CHANGES Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/48147 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/48929 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2012/dsa-2456 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.osvdb.org/79590 Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/52159 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/73444 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://secure.ucc.asn.au/hg/dropbear/rev/818108bf7749 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mantor.org/~northox/misc/CVE-2012-0920.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For dropbear_ssh_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.