Vulnerability CVE-2020-1763
Published: 2020-05-12

Description:
An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could use this flaw to crash libreswan by sending specially-crafted IKEv1 Informational Exchange packets. The daemon respawns after the crash.

Type:

CWE-125

 (Out-of-bounds Read)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Libreswan -> Libreswan 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=1813329
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1763
https://github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8
https://libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txt
https://www.debian.org/security/2020/dsa-4684
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