CVE-2021-20314

2021-08-1100:00:00

ubuntu.com

buffer overflow

libspf2

denial of service

code execution

spf macros

explanation messages

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.003

Percentile

70.8%

JSON

Stack buffer overflow in libspf2 versions below 1.2.11 when processing
certain SPF macros can lead to Denial of service and potentially code
execution via malicious crafted SPF explanation messages.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlibspf2< 1.2.10-7ubuntu0.18.04.1~esm1UNKNOWN
ubuntu20.04noarchlibspf2< 1.2.10-7+deb9u2build0.20.04.1UNKNOWN
ubuntu16.04noarchlibspf2< 1.2.10-6ubuntu0.1~esm1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	libspf2	< 1.2.10-7ubuntu0.18.04.1~esm1	UNKNOWN
ubuntu	20.04	noarch	libspf2	< 1.2.10-7+deb9u2build0.20.04.1	UNKNOWN
ubuntu	16.04	noarch	libspf2	< 1.2.10-6ubuntu0.1~esm1	UNKNOWN