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Red Hat Product Errata RHSA-2021:0742 - Security Advisory
Issued:
2021-03-08
Updated:
2021-03-08

RHSA-2021:0742 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: screen security update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for screen is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The screen utility allows users to have multiple logins on a single terminal.

Security Fix(es):

  • screen: crash when processing combining chars (CVE-2021-26937)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

  • Red Hat Enterprise Linux Server 7 x86_64
  • Red Hat Enterprise Linux Workstation 7 x86_64
  • Red Hat Enterprise Linux Desktop 7 x86_64
  • Red Hat Enterprise Linux for IBM z Systems 7 s390x
  • Red Hat Enterprise Linux for Power, big endian 7 ppc64
  • Red Hat Enterprise Linux for Scientific Computing 7 x86_64
  • Red Hat Enterprise Linux for Power, little endian 7 ppc64le

Fixes

  • BZ - 1927062 - CVE-2021-26937 screen: crash when processing combining chars

CVEs

  • CVE-2021-26937

References

  • https://access.redhat.com/security/updates/classification/#important
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux Server 7

SRPM
screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm SHA-256: 82b3e4b1e4f7959aec1ab79652c87cc2f5f84db39c90d7963e73256ad0a28461
x86_64
screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: 7735b1fc1d3a646bc7dd24760dfcc443833e3be6af8c841c3a10d1be346f3d7d
screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: fe9b6162daa19e86261dc919c5eca67872c659d0e6183237e390ec8a86b7dc64

Red Hat Enterprise Linux Workstation 7

SRPM
screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm SHA-256: 82b3e4b1e4f7959aec1ab79652c87cc2f5f84db39c90d7963e73256ad0a28461
x86_64
screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: 7735b1fc1d3a646bc7dd24760dfcc443833e3be6af8c841c3a10d1be346f3d7d
screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: fe9b6162daa19e86261dc919c5eca67872c659d0e6183237e390ec8a86b7dc64

Red Hat Enterprise Linux Desktop 7

SRPM
screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm SHA-256: 82b3e4b1e4f7959aec1ab79652c87cc2f5f84db39c90d7963e73256ad0a28461
x86_64
screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: 7735b1fc1d3a646bc7dd24760dfcc443833e3be6af8c841c3a10d1be346f3d7d
screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: fe9b6162daa19e86261dc919c5eca67872c659d0e6183237e390ec8a86b7dc64

Red Hat Enterprise Linux for IBM z Systems 7

SRPM
screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm SHA-256: 82b3e4b1e4f7959aec1ab79652c87cc2f5f84db39c90d7963e73256ad0a28461
s390x
screen-4.1.0-0.27.20120314git3c2946.el7_9.s390x.rpm SHA-256: 9d19c41f741a291cc566a7c282ac324877e5646dd234ec9adf45d6ff23f9bd6c
screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.s390x.rpm SHA-256: 0a8008514d189f7493a44f4e121324a436824207f4f762cc4cc402f01b6aea95

Red Hat Enterprise Linux for Power, big endian 7

SRPM
screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm SHA-256: 82b3e4b1e4f7959aec1ab79652c87cc2f5f84db39c90d7963e73256ad0a28461
ppc64
screen-4.1.0-0.27.20120314git3c2946.el7_9.ppc64.rpm SHA-256: 922af933636165eabf4d0285bc93f17c5ee4f7f5fb183660a243497f6644b1dd
screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.ppc64.rpm SHA-256: b179a24d5c100c651001e2b84dac11ad0f47252864f530aa44c911a4909afa80

Red Hat Enterprise Linux for Scientific Computing 7

SRPM
screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm SHA-256: 82b3e4b1e4f7959aec1ab79652c87cc2f5f84db39c90d7963e73256ad0a28461
x86_64
screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: 7735b1fc1d3a646bc7dd24760dfcc443833e3be6af8c841c3a10d1be346f3d7d
screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm SHA-256: fe9b6162daa19e86261dc919c5eca67872c659d0e6183237e390ec8a86b7dc64

Red Hat Enterprise Linux for Power, little endian 7

SRPM
screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm SHA-256: 82b3e4b1e4f7959aec1ab79652c87cc2f5f84db39c90d7963e73256ad0a28461
ppc64le
screen-4.1.0-0.27.20120314git3c2946.el7_9.ppc64le.rpm SHA-256: 86744b3fbc97bf5daa7ec136fda1719aff7aa26b381a3c12c5a3df229a947ee9
screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.ppc64le.rpm SHA-256: 65fb66370d36e7dfc8e0dc6b27b5e45f0753f943501b359df17ef34b3366572c

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

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