CVE-2020-15173 Heap buffer overflow in ACCEL-PPP

High 8.2 Published 9 Sep 2020 Updated 4 Aug 2024

A heap buffer overflow in ACCEL-PPP allows remote attackers to execute arbitrary code or cause denial of service via crafted L2TP control packets.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-15173?

CVE-2020-15173 is a high-severity memory corruption vulnerability in accel-ppp, published on 9 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2020-15173?

It affects 1 product.

Products include Accel-Ppp Accel-Ppp.

How do I fix CVE-2020-15173?

No fix has been published for CVE-2020-15173 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-15173 being exploited?

There is no known exploitation of CVE-2020-15173 in the wild and no public exploit code.

Sources

Also known as GHSA-rr68-fchr-69vf.