CVE-2019-15540 — filters/filter-cso/filter-stream

filters/filter-cso/filter-stream.c in the CSO filter in libMirage 3.2.2 in CDemu does not validate the part size, triggering a heap-based buffer overflow that can lead to root access by a local Linux user.

01What is this vulnerability?

filters/filter-cso/filter-stream.c in the CSO filter in libMirage 3.2.2 in CDemu does not validate the part size, triggering a heap-based buffer overflow that can lead to root access by a local Linux user.

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: 2019-08-25T16:43:54.000Z
• Last modified: 2024-08-05T00:49:13.733Z

09References

• sourceforge.net — https://sourceforge.net/p/cdemu/bugs/119/
• sourceforge.net — https://sourceforge.net/p/cdemu/code/ci/0e9292c9aa34bf545f43f7efe5f0b94faba94962…
• gist.github.com — https://gist.github.com/andreafioraldi/baa79cd78131888d98d6ba680d5f514e
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00086.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00089.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00017.html