Deserialization in Glib
CVE-2023-32636
A flaw was found in glib, where the gvariant deserialization code is vulnerable to a denial of service introduced by additional input validation added to resolve CVE-2023-29499. The offset table validation may be very slow. This bug does not affect any released version of glib but does affect glib distributors who followed the guidance of glib developers to backport the initial fix for CVE-2023-29499.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Glib — versions 2.75.1
- GNOME Glib
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.gnome.org/GNOME/glib/-/issues/2841 (Issue Tracking, Vendor Advisory)
- https://discourse.gnome.org/t/multiple-fixes-for-gvariant-normalisation-issues-… (Broken Link)
- security.netapp.com/advisory/ntap-20231110-0002/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-32636?
- CVE-2023-32636 is a medium-severity vulnerability in Glib, classified under Uncontrolled Resource Consumption. CVSS score: 4.7/10. Published 2023-09-14.
- How severe is CVE-2023-32636?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2023-32636 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.