Remote code execution in PPP daemon



Published: 2020-02-04 | Updated: 2021-01-05
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8597
CWE-ID CWE-119
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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PPP
Server applications / Other server solutions

Vendor Paul Mackerras

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated: 05.01.2021

Changed bulletin status to patched.

1) Buffer overflow

EUVDB-ID: #VU24916

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-8597

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error in the "eap_request" and "eap_response" functions in "eap.c" file in pppd. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PPP: 2.4.2 - 2.4.8


CPE2.3 External links

http://github.com/paulusmack/ppp/commit/8d7970b8f3db727fe798b65f3377fe6787575426

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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