#VU96897 Buffer Underwrite ('Buffer Underflow') in expat
Vulnerability identifier: #VU96897
Vulnerability risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-124
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
expat
Universal components / Libraries /
Libraries used by multiple products
Vendor: libexpat.org
Description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary error in xmlparse.c when handling negative length for XML_ParseBuffer. A remote attacker can pass specially crafted input to the application, trigger buffer underflow and execute arbitrary code on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
expat: 2.0.0 - 2.6.2
External links
http://github.com/libexpat/libexpat/pull/890
http://github.com/libexpat/libexpat/issues/887
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
