PT-2016-3220 · Dropbear+1 · Dropbear Ssh+1

Andrej Nemec · Published 2016-07-12 · Updated 2017-03-04 · CVE-2016-7407

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Dropbear SSH versions prior to 2016.74

Description The issue allows attackers to execute arbitrary code via a crafted OpenSSH key file. This is due to insufficient input validation in the Dropbear SSH package. The dropbearconvert command is specifically vulnerable to this issue, allowing a remote attacker to execute arbitrary code using a specially prepared OpenSSH key file.

Recommendations For versions prior to 2016.74, update to version 2016.74 or later to resolve the issue. As a temporary workaround, consider restricting the use of the dropbearconvert command until a patch is applied. Avoid using the dropbearconvert command with untrusted OpenSSH key files until the issue is resolved.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2016-1786

BDU:2017-02586

CVE-2016-7407

DLA-634-1

MGASA-2016-0301

Affected Products

Alt Linux

Dropbear Ssh

References · 18

• https://bdu.fstec.ru/vul/2017-02586 · Security Note
• http://openwall.com/lists/oss-security/2016/09/15/2 · Patch
• https://advisories.mageia.org/MGASA-2016-0301.html · Security Note
• https://osv.dev/vulnerability/CVE-2016-7407 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-7407 · Security Note
• https://secure.ucc.asn.au/hg/dropbear/rev/34e6127ef02e · Patch
• https://cve.org/CVERecord?id=CVE-2016-7407 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-7407 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-7407 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2016-7407 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-7407 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2016-0301 · Vendor Advisory
• https://secure.ucc.asn.au/hg/dropbear/rev/10f28c95ca31 · Note
• https://bugs.mageia.org/show_bug.cgi?id=19074 · Note
• http://openwall.com/lists/oss-security/2016/09/14/7 · Note