Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2017-9078

Double Free

Published: May 19, 2017 | Modified: Apr 20, 2025
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
8.5 HIGH
AV:N/AC:M/Au:S/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-9078
CWEhttps://cwe.mitre.org/data/definitions/415.html

The server in Dropbear before 2017.75 might allow post-authentication root remote code execution because of a double free in cleanup of TCP listeners when the -a option is enabled.

Weakness

The product calls free() twice on the same memory address.

Affected Software

NameVendorStart VersionEnd Version
Dropbear_sshDropbear_ssh_project*2017.75 (excluding)
DropbearUbuntuartful*
DropbearUbuntuesm-apps/xenial*
DropbearUbuntutrusty*
DropbearUbuntuupstream*
DropbearUbuntuxenial*
DropbearUbuntuyakkety*
DropbearUbuntuzesty*

Potential Mitigations

References

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