Out-of-bounds Read in Libexpat Project
CVE-2019-15903
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.066 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.066 · newest: 0.066 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- usn.ubuntu.com/4132-1/ (vendor-advisory, Third Party Advisory)
- seclists.org/bugtraq/2019/Sep/30 (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4132-2/ (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2019/dsa-4530 (vendor-advisory, Third Party Advisory)
- seclists.org/bugtraq/2019/Sep/37 (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00081.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00080.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2019-15903?
- CVE-2019-15903 is a high-severity vulnerability in Libexpat Project, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2019-09-04.
- How severe is CVE-2019-15903?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-15903 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.