#VU21949 Out-of-bounds read in libpcap
Vulnerability identifier: #VU21949
Vulnerability risk: Low
CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
libpcap
Universal components / Libraries /
Libraries used by multiple products
Vendor: Tcpdump.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in libpcap when during pcapng reading. A remote attacker can pass specially crafted data to the application that uses the affected library, trigger out-of-bounds read error and read contents of memory on the system or crash the application.
Mitigation
Install update from vendor's website.
Vulnerable software versions
libpcap: 0.5.1 - 1.9.0
External links
http://github.com/the-tcpdump-group/libpcap/blob/libpcap-1.9/CHANGES
http://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES
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.
