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Ubuntu.comUB:CVE-2020-11721

HistoryApr 12, 2020 - 12:00 a.m.

CVE-2020-11721

2020-04-1200:00:00

ubuntu.com

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

40.6%

JSON

load_png in loader.c in libsixel.a in libsixel 1.8.6 has an uninitialized
pointer leading to an invalid call to free, which can cause a denial of
service.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlibsixel< anyUNKNOWN
ubuntu20.04noarchlibsixel< anyUNKNOWN
ubuntu22.04noarchlibsixel< anyUNKNOWN
ubuntu23.10noarchlibsixel< anyUNKNOWN
ubuntu24.04noarchlibsixel< anyUNKNOWN
ubuntu16.04noarchlibsixel< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	libsixel	< any	UNKNOWN
ubuntu	20.04	noarch	libsixel	< any	UNKNOWN
ubuntu	22.04	noarch	libsixel	< any	UNKNOWN
ubuntu	23.10	noarch	libsixel	< any	UNKNOWN
ubuntu	24.04	noarch	libsixel	< any	UNKNOWN
ubuntu	16.04	noarch	libsixel	< any	UNKNOWN

References

github.com/saitoha/libsixel/issues/134

launchpad.net/bugs/cve/CVE-2020-11721

nvd.nist.gov/vuln/detail/CVE-2020-11721

security-tracker.debian.org/tracker/CVE-2020-11721

www.cve.org/CVERecord?id=CVE-2020-11721

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

40.6%

JSON

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