Synopsis

Important: krb5-appl security update

Type/Severity

Security Advisory: Important

Topic

An update for krb5-appl is now available for Red Hat Enterprise Linux 6.

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 krb5-appl packages contain Kerberos-aware versions of telnet, ftp, rsh, and rlogin clients and servers. Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and trusted third-party, the Key Distribution Center (KDC).

Security Fix(es):

• telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code (CVE-2020-10188)
  

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 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64

Fixes

• BZ - 1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code

CVEs

• CVE-2020-10188

References

• https://access.redhat.com/security/updates/classification/#important

Red Hat Enterprise Linux Server 6

SRPM
krb5-appl-1.0.1-10.el6_10.src.rpm	SHA-256: 181faaa4873f33ccadddbd7a09514e5c28f849b7d41f5c1656f3c8448da8f73c
x86_64
krb5-appl-clients-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 2276c5254f6fb0dc5887e9f97261d0f5b1de42ca4d55c4feb1bd49f2d6a33456
krb5-appl-debuginfo-1.0.1-10.el6_10.x86_64.rpm	SHA-256: d0be1978ecdc5de0a9f61e55a7e91775d5a52d25e5ff0d1b44a01ed9eac12662
krb5-appl-servers-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 089a3fb0b31d7e1489229dfe3652c069193fa95729da17588e01e66760d3fc4a
i386
krb5-appl-clients-1.0.1-10.el6_10.i686.rpm	SHA-256: 0843e32aa09642a8c8f2bd2be1bf1b36624245e19359e43ca6d1ae48f17df7b2
krb5-appl-debuginfo-1.0.1-10.el6_10.i686.rpm	SHA-256: 2c2338e9d186e025febdcf578176e34c0b7e2ad7016857044fe3b6c72e33f030
krb5-appl-servers-1.0.1-10.el6_10.i686.rpm	SHA-256: 907ea83a5740fd4c254d8ddb8b0c20fa90098b7d253b0afe91ddd207755401c6

Red Hat Enterprise Linux Workstation 6

SRPM
krb5-appl-1.0.1-10.el6_10.src.rpm	SHA-256: 181faaa4873f33ccadddbd7a09514e5c28f849b7d41f5c1656f3c8448da8f73c
x86_64
krb5-appl-clients-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 2276c5254f6fb0dc5887e9f97261d0f5b1de42ca4d55c4feb1bd49f2d6a33456
krb5-appl-debuginfo-1.0.1-10.el6_10.x86_64.rpm	SHA-256: d0be1978ecdc5de0a9f61e55a7e91775d5a52d25e5ff0d1b44a01ed9eac12662
krb5-appl-servers-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 089a3fb0b31d7e1489229dfe3652c069193fa95729da17588e01e66760d3fc4a
i386
krb5-appl-clients-1.0.1-10.el6_10.i686.rpm	SHA-256: 0843e32aa09642a8c8f2bd2be1bf1b36624245e19359e43ca6d1ae48f17df7b2
krb5-appl-debuginfo-1.0.1-10.el6_10.i686.rpm	SHA-256: 2c2338e9d186e025febdcf578176e34c0b7e2ad7016857044fe3b6c72e33f030
krb5-appl-servers-1.0.1-10.el6_10.i686.rpm	SHA-256: 907ea83a5740fd4c254d8ddb8b0c20fa90098b7d253b0afe91ddd207755401c6

Red Hat Enterprise Linux Desktop 6

SRPM
krb5-appl-1.0.1-10.el6_10.src.rpm	SHA-256: 181faaa4873f33ccadddbd7a09514e5c28f849b7d41f5c1656f3c8448da8f73c
x86_64
krb5-appl-clients-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 2276c5254f6fb0dc5887e9f97261d0f5b1de42ca4d55c4feb1bd49f2d6a33456
krb5-appl-debuginfo-1.0.1-10.el6_10.x86_64.rpm	SHA-256: d0be1978ecdc5de0a9f61e55a7e91775d5a52d25e5ff0d1b44a01ed9eac12662
krb5-appl-servers-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 089a3fb0b31d7e1489229dfe3652c069193fa95729da17588e01e66760d3fc4a
i386
krb5-appl-clients-1.0.1-10.el6_10.i686.rpm	SHA-256: 0843e32aa09642a8c8f2bd2be1bf1b36624245e19359e43ca6d1ae48f17df7b2
krb5-appl-debuginfo-1.0.1-10.el6_10.i686.rpm	SHA-256: 2c2338e9d186e025febdcf578176e34c0b7e2ad7016857044fe3b6c72e33f030
krb5-appl-servers-1.0.1-10.el6_10.i686.rpm	SHA-256: 907ea83a5740fd4c254d8ddb8b0c20fa90098b7d253b0afe91ddd207755401c6

Red Hat Enterprise Linux for IBM z Systems 6

SRPM
krb5-appl-1.0.1-10.el6_10.src.rpm	SHA-256: 181faaa4873f33ccadddbd7a09514e5c28f849b7d41f5c1656f3c8448da8f73c
s390x
krb5-appl-clients-1.0.1-10.el6_10.s390x.rpm	SHA-256: 022a5c5e6bd15a42b0d4ebc89e162a9946fe8c78f304a9d504dace776b04c99b
krb5-appl-debuginfo-1.0.1-10.el6_10.s390x.rpm	SHA-256: 97b95471a6b1552a48f5dd1553ece9168e82fe0533d2d6e9e3b7f71e5d223efd
krb5-appl-servers-1.0.1-10.el6_10.s390x.rpm	SHA-256: 3782846e6d1a21125c1d420c08e61c49435e2af4a5eb45eccdc42767f8ed2c2f

Red Hat Enterprise Linux for Power, big endian 6

SRPM
krb5-appl-1.0.1-10.el6_10.src.rpm	SHA-256: 181faaa4873f33ccadddbd7a09514e5c28f849b7d41f5c1656f3c8448da8f73c
ppc64
krb5-appl-clients-1.0.1-10.el6_10.ppc64.rpm	SHA-256: de59a83e9fea043df7ed70f60fe6ab8a708f11fe8474554512527849e5851920
krb5-appl-debuginfo-1.0.1-10.el6_10.ppc64.rpm	SHA-256: fdd3f769d5a3e4a97113ec6c1b6143b28d41932287c9fa025d386d496cfaf7b1
krb5-appl-servers-1.0.1-10.el6_10.ppc64.rpm	SHA-256: 23ddd9e45163e74898892bc9af819077c76c0c64958465d97e9277aabd7306f2

Red Hat Enterprise Linux for Scientific Computing 6

SRPM
krb5-appl-1.0.1-10.el6_10.src.rpm	SHA-256: 181faaa4873f33ccadddbd7a09514e5c28f849b7d41f5c1656f3c8448da8f73c
x86_64
krb5-appl-clients-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 2276c5254f6fb0dc5887e9f97261d0f5b1de42ca4d55c4feb1bd49f2d6a33456
krb5-appl-debuginfo-1.0.1-10.el6_10.x86_64.rpm	SHA-256: d0be1978ecdc5de0a9f61e55a7e91775d5a52d25e5ff0d1b44a01ed9eac12662
krb5-appl-servers-1.0.1-10.el6_10.x86_64.rpm	SHA-256: 089a3fb0b31d7e1489229dfe3652c069193fa95729da17588e01e66760d3fc4a