CVE-2012-0920

Severity: high (CVSS 7.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-06-05 · updated 2026-06-16
Weakness: CWE-399

Description

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."

Affected products

Debian Linux: 6.0, 7.0
[UNKNOWN] dropbear: from 0.52 through 2012.54

References

http://matt.ucc.asn.au/dropbear/CHANGES
http://secunia.com/advisories/48147
http://secunia.com/advisories/48929
http://www.debian.org/security/2012/dsa-2456
http://www.osvdb.org/79590
http://www.securityfocus.com/bid/52159
https://exchange.xforce.ibmcloud.com/vulnerabilities/73444
https://secure.ucc.asn.au/hg/dropbear/rev/818108bf7749
https://www.mantor.org/~northox/misc/CVE-2012-0920.html
http://matt.ucc.asn.au/dropbear/CHANGES
http://secunia.com/advisories/48147
http://secunia.com/advisories/48929

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