SB2016072301 - Format string error in Dropbear SSH server

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Main Vulnerability Database SB2016072301

SB2016072301 - Format string error in Dropbear SSH server

Published: July 23, 2016

Security Bulletin ID SB2016072301
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Format string error (CVE-ID: N/A)

CWE-ID: CWE-134 - Use of Externally-Controlled Format String

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear


The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.

The vulnerability exists due to a format string error when handling usernames, containing format string characters (e.g. %) in getpwnam() function. A remote attacker with the ability to manipulate his username can execute arbitrary code on the target system.

Successful exploitation may allow an attacker to gain complete control over the vulnerable system.


Remediation

Install update from vendor's website.

References