axTLS v2.1.5 was discovered to contain a heap buffer overflow in the bi_import function…
Priority LOW 25CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
axTLS v2.1.5 was discovered to contain a heap buffer overflow in the bi_import function in axtls-code/crypto/bigint.c. This vulnerability allows attackers to cause a Denial of Service (DoS) when parsing a private key.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.003 22nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:axtls_project:axtls:2.1.5:*:*:*:*:*:*:* | 2.1.5 | Vulnerable | Axtls Project |
- cpe:2.3:a:axtls_project:axtls:2.1.5:*:*:*:*:*:*:* Versions 2.1.5 Vulnerable ·Axtls Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-33613
- 2026-10-03 Alias added: GHSA-3485-35jp-jwmx
References
More Axtls Project Axtls vulnerabilities
- TI-2019-06472 tls1.c in Cameron Hamilton-Rich axTLS before 2.1.5 has a Buffer Overflow via a crafted… CVSS 3.0CRITICAL 9.8
- TI-2019-07349 The asn1_signature function in asn1.c in Cameron Hamilton-Rich axTLS through 2.1.5 has a… CVSS 3.1HIGH 7.5
- TI-2019-07090 process_certificate in tls1.c in Cameron Hamilton-Rich axTLS through 2.1.5 has a Buffer… CVSS 3.1HIGH 7.5
- TI-2018-11548 In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature… CVSS 3.0MEDIUM 5.9
- TI-2018-11638 In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature… CVSS 3.0MEDIUM 5.9
- TI-2018-11549 In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature… CVSS 3.0MEDIUM 5.9
Sources
- CVE-2023-33613 · CVE Program
- CVE-2023-33613 · NVD
- FIRST EPSS
- GHSA-3485-35jp-jwmx · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences