CVE-2019-17533 — Mat_VarReadNextInfo4 in mat4

Mat_VarReadNextInfo4 in mat4.c in MATIO 1.5.17 omits a certain '\0' character, leading to a heap-based buffer over-read in strdup_vprintf when uninitialized memory is accessed.

01What is this vulnerability?

Mat_VarReadNextInfo4 in mat4.c in MATIO 1.5.17 omits a certain '\0' character, leading to a heap-based buffer over-read in strdup_vprintf when uninitialized memory is accessed.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-10-13T02:00:33.000Z
• Last modified: 2024-08-05T01:40:15.927Z

09References

• github.com — https://github.com/tbeu/matio/commit/651a8e28099edb5fbb9e4e1d4d3238848f446c9a
• bugs.chromium.org — https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16856
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00037.html