CVE-2020-15173: Accel-Ppp

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

In ACCEL-PPP (an implementation of PPTP/PPPoE/L2TP/SSTP), there is a buffer overflow when receiving an l2tp control packet ith an AVP which type is a string and no hidden flags, length set to less than 6. If your application is used in open networks or there are untrusted nodes in the network it is highly recommended to apply the patch. The problem was patched with commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b As a workaround changes of commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b can be applied to older versions.

Affected products

• Accel-Ppp Accel-Ppp: up to and including 1.12.0-92-g38b6104

Published 2020-09-09. Last modified 2026-06-17.