Vulnerability in Libexpat Project
CVE-2022-25235
xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.
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: 0.050 (92.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.050 · newest: 0.050 · change: 0.000
Affected products
- Libexpat Project
- Oracle HTTP Server — versions 12.2.1.3.0, 12.2.1.4.0
- Oracle Zfs Storage Appliance Kit — versions 8.8
- Siemens Sinema Remote Connect Server
- Debian Linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libexpat/libexpat/pull/562 (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/02/19/1 (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5085 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2022/03/msg00007.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20220303-0008/ (Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf (Third Party Advisory)
- security.gentoo.org/glsa/202209-24 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-25235?
- CVE-2022-25235 is a critical-severity vulnerability in Libexpat Project, classified under Improper Encoding or Escaping of Output. CVSS score: 9.8/10. Published 2022-02-16.
- How severe is CVE-2022-25235?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-25235 known to be exploited?
- 19 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.