VulnerabilityModified
CVE-2017-16931
parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.
CRITICAL 9.8EPSS 4.28%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.28% probability · 91th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- xmlsoft/libxml2
- Source
- cve@mitre.org
References
- http://xmlsoft.org/news.htmlRelease Notes, Vendor Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=766956Permissions Required
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- http://xmlsoft.org/news.htmlRelease Notes, Vendor Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=766956Permissions Required
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
- https://www.oracle.com//security-alerts/cpujul2021.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.