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 Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Dropbear_ssh | Dropbear_ssh_project | 0.52 (including) | 2012.54 (including) |
| Dropbear | Ubuntu | hardy | * |
| Dropbear | Ubuntu | lucid | * |
| Dropbear | Ubuntu | natty | * |
| Dropbear | Ubuntu | oneiric | * |
| Dropbear | Ubuntu | precise | * |
| Dropbear | Ubuntu | upstream | * |
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
- 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