Integer overflow in Libexpat Project
CVE-2022-22823
build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.036 (89.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.036 · change: +0.002
Affected products
- Libexpat Project
- Siemens Sinema Remote Connect Server
- Tenable Nessus
- Debian Linux — versions 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libexpat/libexpat/pull/539 (Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/01/17/3 (mailing-list, Mailing List, Third Party Advisory)
- www.tenable.com/security/tns-2022-05 (Third Party Advisory)
- www.debian.org/security/2022/dsa-5073 (vendor-advisory, Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf (Patch, Third Party Advisory)
- security.gentoo.org/glsa/202209-24 (vendor-advisory, Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2022-22823?
- CVE-2022-22823 is a critical-severity vulnerability in Libexpat Project, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2022-01-10.
- How severe is CVE-2022-22823?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-22823 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.