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redhatRedHatRHSA-2021:1593
HistoryMay 18, 2021 - 5:36 a.m.

(RHSA-2021:1593) Moderate: krb5 security update

2021-05-1805:36:22
access.redhat.com
21

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.005 Low

EPSS

Percentile

76.5%

JSON

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).

Security Fix(es):

  • krb5: unbounded recursion via an ASN.1-encoded Kerberos message in lib/krb5/asn.1/asn1_encode.c may lead to DoS (CVE-2020-28196)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.

OSVersionArchitecturePackageVersionFilename
RedHat8i686krb5-devel< 1.18.2-8.el8krb5-devel-1.18.2-8.el8.i686.rpm
RedHat8aarch64krb5-debuginfo< 1.18.2-8.el8krb5-debuginfo-1.18.2-8.el8.aarch64.rpm
RedHat8aarch64krb5-debugsource< 1.18.2-8.el8krb5-debugsource-1.18.2-8.el8.aarch64.rpm
RedHat8s390xkrb5-server-ldap< 1.18.2-8.el8krb5-server-ldap-1.18.2-8.el8.s390x.rpm
RedHat8x86_64krb5-server-ldap< 1.18.2-8.el8krb5-server-ldap-1.18.2-8.el8.x86_64.rpm
RedHat8ppc64lekrb5-libs< 1.18.2-8.el8krb5-libs-1.18.2-8.el8.ppc64le.rpm
RedHat8s390xkrb5-server< 1.18.2-8.el8krb5-server-1.18.2-8.el8.s390x.rpm
RedHat8x86_64krb5-workstation-debuginfo< 1.18.2-8.el8krb5-workstation-debuginfo-1.18.2-8.el8.x86_64.rpm
RedHat8aarch64krb5-server< 1.18.2-8.el8krb5-server-1.18.2-8.el8.aarch64.rpm
RedHat8aarch64krb5-workstation-debuginfo< 1.18.2-8.el8krb5-workstation-debuginfo-1.18.2-8.el8.aarch64.rpm
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1-10 of 791

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7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.005 Low

EPSS

Percentile

76.5%

JSON
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