Description
libxml2, possibly before 2.5.0, does not properly detect recursion during entity expansion, which allows context-dependent attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, aka the "billion laughs attack."
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
- xmlsoft / libxml22.5.0
References
- VENDOR_ADVISORYhttp://secunia.com/advisories/31868
- MISChttp://xmlsoft.org/news.html
- MISChttp://www.stylusstudio.com/xmldev/200302/post20020.html
- MISChttp://www.reddit.com/r/programming/comments/65843/time_to_upgrade_libxml2
- MISChttp://mail.gnome.org/archives/xml/2008-August/msg00034.html
- MISChttp://www.redhat.com/support/errata/RHSA-2008-0886.html