1) Buffer overflow

Severity: High

CVSSv3: 9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2020-8597

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

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

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PPP: 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.4.6, 2.4.7, 2.4.8

CPE

• cpe:/a:paul_mackerras:point-to-point protocol:2.4.8:
• cpe:/a:paul_mackerras:point-to-point protocol:2.4.7:
• cpe:/a:paul_mackerras:point-to-point protocol:2.4.6:
• cpe:/a:paul_mackerras:point-to-point protocol:2.4.5:
• cpe:/a:paul_mackerras:point-to-point protocol:2.4.4:
• cpe:/a:paul_mackerras:point-to-point protocol:2.4.3:
• cpe:/a:paul_mackerras:point-to-point protocol:2.4.2:

External links

https://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.