Description
A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- Canonical / Ubuntu Linux12.04 – 12.04
- Canonical / Ubuntu Linux14.04 – 14.04
- Canonical / Ubuntu Linux16.04 – 16.04
- Canonical / Ubuntu Linux18.04 – 18.04
- Debian / debian_linux
- xmlsoft / libxml22.9.8
References
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2018/09/msg00035.html
- MISChttps://gitlab.gnome.org/GNOME/libxml2/issues/10
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3739-1/
- VENDOR_ADVISORYhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901817
- VENDOR_ADVISORYhttps://usn.ubuntu.com/3739-2/
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=1595985
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1543
- MISChttps://security.netapp.com/advisory/ntap-20190719-0002/
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2020/09/msg00009.html
Updated 10m ago · 8 sources