Out-of-bounds read in busybox (Alpine package)



Published: 2019-01-24
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-20679
CWE-ID CWE-125
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		busybox (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU16958

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-20679

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in udhcp components (consumed by the DHCP server, client, and relay). A remote attacker can leak sensitive information from the stack by sending a crafted DHCP message.

Mitigation

Install update from vendor's website.

Vulnerable software versions

busybox (Alpine package): 1.28.1-r0 - 1.29.3-r9

CPE2.3 External links

http://git.alpinelinux.org/aports/commit/?id=397f0cd902eaadce3b74e1e3021e941d9bb6ba72
http://git.alpinelinux.org/aports/commit/?id=cf43a775225bcace5eda5940576e46caac38d471


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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