[SECURITY] [DSA 4861-1] screen security update

2021-02-2108:31:22

lists.debian.org

9.8 High

CVSS3

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

7.5 High

CVSS2

Access Vector

NETWORK

Access 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

JSON

Debian Security Advisory DSA-4861-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
February 21, 2021 https://www.debian.org/security/faq

Package : screen
CVE ID : CVE-2021-26937
Debian Bug : 982435

Felix Weinmann reported a flaw in the handling of combining characters
in screen, a terminal multiplexer with VT100/ANSI terminal emulation,
which can result in denial of service, or potentially the execution of
arbitrary code via a specially crafted UTF-8 character sequence.

For the stable distribution (buster), this problem has been fixed in
version 4.6.2-3+deb10u1.

We recommend that you upgrade your screen packages.

For the detailed security status of screen please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/screen

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

OSVersionArchitecturePackageVersionFilename
Debian10s390xscreen-udeb< 4.6.2-3+deb10u1screen-udeb_4.6.2-3+deb10u1_s390x.deb
Debian10mipselscreen-dbgsym< 4.6.2-3+deb10u1screen-dbgsym_4.6.2-3+deb10u1_mipsel.deb
Debian10armelscreen-dbgsym< 4.6.2-3+deb10u1screen-dbgsym_4.6.2-3+deb10u1_armel.deb
Debian10s390xscreen-dbgsym< 4.6.2-3+deb10u1screen-dbgsym_4.6.2-3+deb10u1_s390x.deb
Debian10ppc64elscreen-udeb< 4.6.2-3+deb10u1screen-udeb_4.6.2-3+deb10u1_ppc64el.deb
Debian9i386screen< 4.5.0-6+deb9u1screen_4.5.0-6+deb9u1_i386.deb
Debian10mipselscreen-udeb< 4.6.2-3+deb10u1screen-udeb_4.6.2-3+deb10u1_mipsel.deb
Debian9amd64screen< 4.5.0-6+deb9u1screen_4.5.0-6+deb9u1_amd64.deb
Debian10ppc64elscreen-dbgsym< 4.6.2-3+deb10u1screen-dbgsym_4.6.2-3+deb10u1_ppc64el.deb
Debian9arm64screen< 4.5.0-6+deb9u1screen_4.5.0-6+deb9u1_arm64.deb

OS	Version	Architecture	Package	Version	Filename
Debian	10	s390x	screen-udeb	< 4.6.2-3+deb10u1	screen-udeb_4.6.2-3+deb10u1_s390x.deb
Debian	10	mipsel	screen-dbgsym	< 4.6.2-3+deb10u1	screen-dbgsym_4.6.2-3+deb10u1_mipsel.deb
Debian	10	armel	screen-dbgsym	< 4.6.2-3+deb10u1	screen-dbgsym_4.6.2-3+deb10u1_armel.deb
Debian	10	s390x	screen-dbgsym	< 4.6.2-3+deb10u1	screen-dbgsym_4.6.2-3+deb10u1_s390x.deb
Debian	10	ppc64el	screen-udeb	< 4.6.2-3+deb10u1	screen-udeb_4.6.2-3+deb10u1_ppc64el.deb
Debian	9	i386	screen	< 4.5.0-6+deb9u1	screen_4.5.0-6+deb9u1_i386.deb
Debian	10	mipsel	screen-udeb	< 4.6.2-3+deb10u1	screen-udeb_4.6.2-3+deb10u1_mipsel.deb
Debian	9	amd64	screen	< 4.5.0-6+deb9u1	screen_4.5.0-6+deb9u1_amd64.deb
Debian	10	ppc64el	screen-dbgsym	< 4.6.2-3+deb10u1	screen-dbgsym_4.6.2-3+deb10u1_ppc64el.deb
Debian	9	arm64	screen	< 4.5.0-6+deb9u1	screen_4.5.0-6+deb9u1_arm64.deb