What is CVE-2017-12966?

CVE-2017-12966 is a medium-severity vulnerability in Asn1c Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2017-08-20.

How severe is CVE-2017-12966?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2017-12966 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Asn1c Project

CVE-2017-12966

The asn1f_lookup_symbol_impl function in asn1fix_retrieve.c in libasn1fix.a in asn1c 0.9.28 allows remote attackers to cause a denial of service (segmentation fault) via a crafted .asn1 file.

Vulnerability class: Buffer Overflow

Published 2017-08-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Asn1c Project — versions 0.9.28

Weakness classification (CWE)

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

Public proof-of-concept exploits

References

drive.google.com/open (Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2017-12966?: CVE-2017-12966 is a medium-severity vulnerability in Asn1c Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2017-08-20.
How severe is CVE-2017-12966?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2017-12966 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.