CVE-2010-4020

krb5: krb5 may accept authdata checksums with low-entropy derived keys (MITKRB5-SA-2010-007)

Severity Score

6.3

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.

MIT Kerberos 5 (también conocido como krb5) v1.8.x hasta v1.8.3 no rechaza las sumas de comprobación RC4 (clave de derivación), lo que podría permitir a usuarios remotos autenticados falsificar un (1) AD-SIGNEDPATH o (2) la firma AD-KDC-ISSUED, y posiblemente obtener privilegios, aprovechando el espacio de claves pequeñas que resultan de ciertas operaciones de cifrado de flujo de un byte (one-byte).

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2010-10-20 CVE Reserved
2010-12-01 CVE Published
2023-03-07 EPSS Updated
2024-08-07 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-310: Cryptographic Issues

CAPEC

References (25)

URL	Tag	Source
http://kb.vmware.com/kb/1035108	X_refsource_confirm
http://lists.vmware.com/pipermail/security-announce/2011/000133.html	Mailing List
http://osvdb.org/69608	Vdb Entry
http://support.apple.com/kb/HT4581	X_refsource_confirm
http://www.securityfocus.com/archive/1/514953/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/517739/100/0/threaded	Mailing List
http://www.securityfocus.com/bid/45117	Vdb Entry
http://www.securitytracker.com/id?1024803	Vdb Entry
http://www.vmware.com/security/advisories/VMSA-2011-0007.html	X_refsource_confirm
http://www.vupen.com/english/advisories/2010/3094	Vdb Entry
http://www.vupen.com/english/advisories/2010/3095	Vdb Entry
http://www.vupen.com/english/advisories/2010/3118	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html	2020-01-21

URL	Date	SRC
http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html	2020-01-21
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/051976.html	2020-01-21
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/051999.html	2020-01-21
http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.html	2020-01-21
http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html	2020-01-21
http://secunia.com/advisories/42399	2020-01-21
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt	2020-01-21
http://www.mandriva.com/security/advisories?name=MDVSA-2010:246	2020-01-21
http://www.redhat.com/support/errata/RHSA-2010-0925.html	2020-01-21
http://www.ubuntu.com/usn/USN-1030-1	2020-01-21
https://access.redhat.com/security/cve/CVE-2010-4020	2010-11-30
https://bugzilla.redhat.com/show_bug.cgi?id=648735	2010-11-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.8 Search vendor "Mit" for product "Kerberos 5" and version "1.8"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.8.1 Search vendor "Mit" for product "Kerberos 5" and version "1.8.1"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.8.2 Search vendor "Mit" for product "Kerberos 5" and version "1.8.2"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.8.3 Search vendor "Mit" for product "Kerberos 5" and version "1.8.3"		-		Affected