CVE-2009-0846

krb5: ASN.1 decoder can free uninitialized pointer when decoding an invalid encoding (MITKRB5-SA-2009-002)

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.

La función asn1_decode_generaltime en lib/krb5/asn.1/asn1_decode.c en el decodificador ASN.1 GeneralizedTime en MIT Kerberos 5 (también conocido como Krb5) anteriores a v1.6.4, permite a atacantes remotos provocar una denegación de servicio (caída del demonio) o posiblemente ejecución de código de su elección a través de vectores que implican una codificación DER inválida, que provocará una liberación del puntero no inicializado.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2009-03-06 CVE Reserved
2009-04-09 CVE Published
2024-08-07 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free
CWE-824: Access of Uninitialized Pointer

CAPEC

References (52)

URL	Tag	Source
http://lists.vmware.com/pipermail/security-announce/2009/000059.html	Broken Link
http://secunia.com/advisories/34594	Broken Link
http://secunia.com/advisories/34598	Broken Link
http://secunia.com/advisories/34617	Broken Link
http://secunia.com/advisories/34622	Broken Link
http://secunia.com/advisories/34628	Broken Link
http://secunia.com/advisories/34630	Broken Link
http://secunia.com/advisories/34637	Broken Link
http://secunia.com/advisories/34640	Broken Link
http://secunia.com/advisories/34734	Broken Link
http://secunia.com/advisories/35074	Broken Link
http://secunia.com/advisories/35667	Broken Link
http://support.apple.com/kb/HT3549	Third Party Advisory
http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm	Third Party Advisory
http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html	Broken Link
http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html	Broken Link
http://wiki.rpath.com/Advisories:rPSA-2009-0058	Broken Link
http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058	Broken Link
http://www-01.ibm.com/support/docview.wss?uid=swg21396120	Broken Link
http://www.kb.cert.org/vuls/id/662091	Broken Link
http://www.securityfocus.com/archive/1/502527/100/0/threaded	Broken Link
http://www.securityfocus.com/archive/1/502546/100/0/threaded	Broken Link
http://www.securityfocus.com/archive/1/504683/100/0/threaded	Broken Link
http://www.securityfocus.com/bid/34409	Broken Link
http://www.securitytracker.com/id?1021994	Broken Link
http://www.us-cert.gov/cas/techalerts/TA09-133A.html	Third Party Advisory
http://www.vmware.com/security/advisories/VMSA-2009-0008.html	Third Party Advisory
http://www.vupen.com/english/advisories/2009/0960	Broken Link
http://www.vupen.com/english/advisories/2009/0976	Broken Link
http://www.vupen.com/english/advisories/2009/1057	Broken Link
http://www.vupen.com/english/advisories/2009/1106	Broken Link
http://www.vupen.com/english/advisories/2009/1297	Broken Link
http://www.vupen.com/english/advisories/2009/2084	Broken Link
http://www.vupen.com/english/advisories/2009/2248	Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10694	Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5483	Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6301	Broken Link

URL	Date	SRC

URL	Date	SRC
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt	2024-02-09

URL	Date	SRC
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html	2024-02-09
http://marc.info/?l=bugtraq&m=124896429301168&w=2	2024-02-09
http://marc.info/?l=bugtraq&m=130497213107107&w=2	2024-02-09
http://rhn.redhat.com/errata/RHSA-2009-0409.html	2024-02-09
http://rhn.redhat.com/errata/RHSA-2009-0410.html	2024-02-09
http://security.gentoo.org/glsa/glsa-200904-09.xml	2024-02-09
http://sunsolve.sun.com/search/document.do?assetkey=1-26-256728-1	2024-02-09
http://www.mandriva.com/security/advisories?name=MDVSA-2009:098	2024-02-09
http://www.redhat.com/support/errata/RHSA-2009-0408.html	2024-02-09
http://www.ubuntu.com/usn/usn-755-1	2024-02-09
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00205.html	2024-02-09
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00206.html	2024-02-09
https://access.redhat.com/security/cve/CVE-2009-0846	2009-04-07
https://bugzilla.redhat.com/show_bug.cgi?id=491036	2009-04-07

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"				< 1.6.4 Search vendor "Mit" for product "Kerberos 5" and version " < 1.6.4"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				9 Search vendor "Fedoraproject" for product "Fedora" and version "9"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				10 Search vendor "Fedoraproject" for product "Fedora" and version "10"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				6.06 Search vendor "Canonical" for product "Ubuntu Linux" and version "6.06"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				7.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "7.10"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				8.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "8.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				8.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "8.10"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				< 10.5.7 Search vendor "Apple" for product "Mac Os X" and version " < 10.5.7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				4.0 Search vendor "Redhat" for product "Enterprise Linux" and version "4.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				3.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "3.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				4.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "4.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				4.7 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "4.7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				2.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "2.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				3.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "3.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				4.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "4.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				2.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "2.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				3.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "3.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				4.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "4.0"		-		Affected