Heap buffer overflow in ACCEL-PPP
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| https://accel-ppp.org/ | accel-ppp | up to 1.12.0-92-g38b6104 | — | No fix listed | CNA |
- accel-ppp Vendorhttps://accel-ppp.org/ Affected up to 1.12.0-92-g38b6104 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:accel-ppp:accel-ppp:*:*:*:*:*:*:*:* | up to 1.12.0-92-g38b6104 | Vulnerable | https://accel-ppp.org/ |
- cpe:2.3:a:accel-ppp:accel-ppp:*:*:*:*:*:*:*:* Versions up to 1.12.0-92-g38b6104 Vulnerable ·https://accel-ppp.org/
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15173
References
More https://accel-ppp.org/ Accel-ppp vulnerabilities
- TI-2020-17131 Variable underflow exists in accel-ppp radius/packet.c when receiving a RADIUS… CVSS 3.1CRITICAL 9.8
- TI-2022-00881 Buffer Overflow via crafted client request in Accel-PPP v1.12 CVSS 3.1CRITICAL 9.8
- TI-2022-08520 Buffer Overflow via Crafted Ipv6 Prefix Attribute Type Client Request in accel-ppp v1.12 CVSS 3.1CRITICAL 9.8
- TI-2022-08519 Buffer Overflow via Crafted IPv6 Addr Attribute Type Client Request in Accel-PPP v1.12 CVSS 3.1CRITICAL 9.8
- TI-2021-19024 ACCEL-PPP 1.12.0 has an out-of-bounds read in post_msg when processing a call_clear_request. CVSS 3.1HIGH 7.5
- TI-2021-18565 ACCEL-PPP 1.12.0 has an out-of-bounds read in triton_context_schedule if the client exits after authentication. CVSS 3.1HIGH 7.5
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences