The remote Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5800-1 advisory.

    It was discovered that Heimdal incorrectly handled certain SPNEGO tokens. A remote attacker could possibly     use this issue to cause a denial of service. (CVE-2021-44758)

    Evgeny Legerov discovered that Heimdal incorrectly handled memory when performing certain DES decryption     operations. A remote attacker could use this issue to cause a denial of service, or possibly execute     arbitrary code. (CVE-2022-3437)

    Greg Hudson discovered that Kerberos PAC implementation used in Heimdal incorrectly handled certain     parsing operations. A remote attacker could use this issue to cause a denial of service, or possibly     execute arbitrary code. (CVE-2022-42898)

    It was discovered that Heimdal's KDC did not properly handle certain error conditions. A remote attacker     could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2022-44640)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2023:0020-1 advisory.

  - All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue,     where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be     opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by     forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute     delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD     DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the     not-delegated flag set. (CVE-2019-14870)

  - A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ     (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
    (CVE-2021-3671)

  - Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a     preferred_mech_type of GSS_C_NO_OID and a nonzero initial_response value to send_accept. (CVE-2021-44758)

  - A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and     unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI     library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a     maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the     application, possibly resulting in a denial of service (DoS) attack. (CVE-2022-3437)

  - Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a     denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via     PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users     should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue. (CVE-2022-41916)

  - PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that     may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit     platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other     platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has a similar bug.
    (CVE-2022-42898)

  - Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the     ASN.1 codec used by the Key Distribution Center (KDC). (CVE-2022-44640)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3206 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3206-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Guilhem Moulin     November 26, 2022                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : heimdal     Version        : 7.5.0+dfsg-3+deb10u1     CVE ID         : CVE-2019-14870 CVE-2021-3671 CVE-2021-44758 CVE-2022-3437                      CVE-2022-41916 CVE-2022-42898 CVE-2022-44640     Debian Bug     : 946786 996586 1024187

    Multiple security vulnerabilities were discovered in heimdal, an     implementation of the Kerberos 5 authentication protocol, which may     result in denial of service, information disclosure, or remote code     execution.

    CVE-2019-14870

        Isaac Boukris reported that the Heimdal KDC before 7.7.1 does not         apply delegation_not_allowed (aka not-delegated) user attributes for         S4U2Self.  Instead the forwardable flag is set even if the         impersonated client has the not-delegated flag set.

    CVE-2021-3671

        Joseph Sutton discovered that the Heimdal KDC before 7.7.1 does not         check for missing missing sname in TGS-REQ (Ticket Granting Server -         Request) before before dereferencing.  An authenticated user could         use this flaw to crash the KDC.

    CVE-2021-44758

        It was discovered that Heimdal is prone to a NULL dereference in         acceptors when the initial SPNEGO token has no acceptable         mechanisms, which may result in denial of service for a server         application that uses the Simple and Protected GSSAPI Negotiation         Mechanism (SPNEGO).

    CVE-2022-3437

        Evgeny Legerov reported that the DES and Triple-DES decryption         routines in the Heimdal GSSAPI library before 7.7.1 were prone to         buffer overflow on malloc() allocated memory when presented with a         maliciously small packet.  In addition, the Triple-DES and RC4         (arcfour) decryption routine were prone to non-constant time leaks,         which could potentially yield to a leak of secret key material when         using these ciphers.

    CVE-2022-41916

        It was discovered that Heimdal's PKI certificate validation library         before 7.7.1 can under some circumstances perform an out-of-bounds         memory access when normalizing Unicode, which may result in denial         of service.

    CVE-2022-42898

        Greg Hudson discovered an integer multiplication overflow in the         Privilege Attribute Certificate (PAC) parsing routine, which may         result in denial of service for Heimdal KDCs and possibly Heimdal         servers (e.g., via GSS-API) on 32-bit systems.

    CVE-2022-44640

        Douglas Bagnall and the Heimdal maintainers independently discovered         that Heimdal's ASN.1 compiler before 7.7.1 generates code that         allows specially crafted DER encodings of CHOICEs to invoke the         wrong free() function on the decoded structure upon decode error,         which may result in remote code execution in the Heimdal KDC and         possibly the Kerberos client, the X.509 library, and other         components as well.

    For Debian 10 buster, these problems have been fixed in version     7.5.0+dfsg-3+deb10u1.

    We recommend that you upgrade your heimdal packages.

    For the detailed security status of heimdal please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/heimdal

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202310-06 (Heimdal: Multiple Vulnerabilities)

  - All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue,     where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be     opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by     forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute     delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD     DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the     not-delegated flag set. (CVE-2019-14870)

  - Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a     preferred_mech_type of GSS_C_NO_OID and a nonzero initial_response value to send_accept. (CVE-2021-44758)

  - A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and     unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI     library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a     maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the     application, possibly resulting in a denial of service (DoS) attack. (CVE-2022-3437)

  - A vulnerability classified as critical was found in SourceCodester eLearning System 1.0. This     vulnerability affects unknown code of the file /admin/students/manage.php. The manipulation of the     argument id leads to sql injection. The attack can be initiated remotely. The exploit has been disclosed     to the public and may be used. VDB-212014 is the identifier assigned to this vulnerability.
    (CVE-2022-3671)

  - Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a     denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via     PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users     should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue. (CVE-2022-41916)

  - PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that     may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit     platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other     platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has a similar bug.
    (CVE-2022-42898)

  - Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the     ASN.1 codec used by the Key Distribution Center (KDC). (CVE-2022-44640)

  - The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug     by adding != 0 comparisons to the result of memcmp. When these patches were backported to the     heimdal-7.7.1 and heimdal-7.8.0 branches (and possibly other branches) a logic inversion sneaked in     causing the validation of message integrity codes in gssapi/arcfour to be inverted. (CVE-2022-45142)

  -  Please review the referenced CVE identifiers for details.  (CVE-2022-44758)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the     ASN.1 codec used by the Key Distribution Center (KDC). (CVE-2022-44640)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5287 advisory.

    Several vulnerabilities were discovered in Heimdal, an implementation of Kerberos 5 that aims to be     compatible with MIT Kerberos. CVE-2021-3671 Joseph Sutton discovered that the Heimdal KDC does not     validate that the server name in the TGS-REQ is present before dereferencing, which may result in denial     of service. CVE-2021-44758 It was discovered that Heimdal is prone to a NULL dereference in acceptors     where an initial SPNEGO token that has no acceptable mechanisms, which may result in denial of service for     a server application that uses SPNEGO. CVE-2022-3437 Several buffer overflow flaws and non-constant time     leaks were discovered when using 1DES, 3DES or RC4 (arcfour). CVE-2022-41916 An out-of-bounds memory     access was discovered when Heimdal normalizes Unicode, which may result in denial of service.
    CVE-2022-42898 It was discovered that integer overflows in PAC parsing may result in denial of service for     Heimdal KDCs or possibly Heimdal servers. CVE-2022-44640 It was discovered that the Heimdal's ASN.1     compiler generates code that allows specially crafted DER encodings to invoke an invalid free on the     decoded structure upon decode error, which may result in remote code execution in the Heimdal KDC. For the     stable distribution (bullseye), these problems have been fixed in version 7.7.0+dfsg-2+deb11u2. We     recommend that you upgrade your heimdal packages. For the detailed security status of heimdal please refer     to its security tracker page at: https://security-tracker.debian.org/tracker/heimdal

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 36 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2022-dba9ba8e2b advisory.

    Fixes:

    * Delay service starts until after network is online (rhbz#2005501)
    * Restart services on package update (will apply when updating from this release)


    ----

    This release fixes the following Security Vulnerabilities:

    * CVE-2022-42898 PAC parse integer overflows
    * CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour
    * CVE-2022-41916 Fix Unicode normalization read of 1 bytes past end of array
    * CVE-2021-44758 NULL dereference DoS in SPNEGO acceptors
    * CVE-2021-3671 A null pointer de-reference when handling missing sname in TGS-REQ
    * CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec

    Note that CVE-2022-44640 is a severe vulnerability, possibly a 10.0 on the Common Vulnerability Scoring     System (CVSS) v3.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2022-2c77cee4b5 advisory.

    Fixes:

    * Delay service starts until after network is online (rhbz#2005501)
    * Restart services on package update (will apply when updating from this release)


    ----

    This release fixes the following Security Vulnerabilities:

    * CVE-2022-42898 PAC parse integer overflows
    * CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour
    * CVE-2022-41916 Fix Unicode normalization read of 1 bytes past end of array
    * CVE-2021-44758 NULL dereference DoS in SPNEGO acceptors
    * CVE-2021-3671 A null pointer de-reference when handling missing sname in TGS-REQ
    * CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec

    Note that CVE-2022-44640 is a severe vulnerability, possibly a 10.0 on the Common Vulnerability Scoring     System (CVSS) v3.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 35 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2022-cbbd105d08 advisory.

    Fixes:

    * Delay service starts until after network is online (rhbz#2005501)
    * Restart services on package update (will apply when updating from this release)


    ----

    This release fixes the following Security Vulnerabilities:

    * CVE-2022-42898 PAC parse integer overflows
    * CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour
    * CVE-2022-41916 Fix Unicode normalization read of 1 bytes past end of array
    * CVE-2021-44758 NULL dereference DoS in SPNEGO acceptors
    * CVE-2021-3671 A null pointer de-reference when handling missing sname in TGS-REQ
    * CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec

    Note that CVE-2022-44640 is a severe vulnerability, possibly a 10.0 on the Common Vulnerability Scoring     System (CVSS) v3.



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 97c1b0f7-47b9-11ee-8e38-002590c1f29c advisory.

  - All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue,     where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be     opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by     forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute     delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD     DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the     not-delegated flag set. (CVE-2019-14870)

  - Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a     preferred_mech_type of GSS_C_NO_OID and a nonzero initial_response value to send_accept. (CVE-2021-44758)

  - A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and     unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI     library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a     maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the     application, possibly resulting in a denial of service (DoS) attack. (CVE-2022-3437)

  - PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that     may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit     platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other     platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has a similar bug.
    (CVE-2022-42898)

  - Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the     ASN.1 codec used by the Key Distribution Center (KDC). (CVE-2022-44640)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the samba package has been released.

The version of heimdal / samba installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2022-44640 advisory.

  - Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the     ASN.1 codec used by the Key Distribution Center (KDC). (CVE-2022-44640)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2023:0019-1 advisory.

  - All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue,     where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be     opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by     forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute     delegation_not_allowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD     DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the     not-delegated flag set. (CVE-2019-14870)

  - A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ     (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
    (CVE-2021-3671)

  - Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a     preferred_mech_type of GSS_C_NO_OID and a nonzero initial_response value to send_accept. (CVE-2021-44758)

  - A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and     unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI     library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a     maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the     application, possibly resulting in a denial of service (DoS) attack. (CVE-2022-3437)

  - Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a     denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via     PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users     should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue. (CVE-2022-41916)

  - PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that     may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit     platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other     platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has a similar bug.
    (CVE-2022-42898)

  - Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the     ASN.1 codec used by the Key Distribution Center (KDC). (CVE-2022-44640)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
170001	Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS : Heimdal vulnerabilities (USN-5800-1)	Nessus	Ubuntu Local Security Checks	1/12/2023	8/27/2024	critical
170098	openSUSE 15 Security Update : libheimdal (openSUSE-SU-2023:0020-1)	Nessus	SuSE Local Security Checks	1/17/2023	9/7/2023	critical
168205	Debian dla-3206 : heimdal-clients - security update	Nessus	Debian Local Security Checks	11/27/2022	1/22/2025	critical
182758	GLSA-202310-06 : Heimdal: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	10/8/2023	12/22/2023	critical
225105	Linux Distros Unpatched Vulnerability : CVE-2022-44640	Nessus	Misc.	3/5/2025	3/5/2025	critical
168145	Debian DSA-5287-1 : heimdal - security update	Nessus	Debian Local Security Checks	11/23/2022	1/24/2025	critical
169051	Fedora 36 : heimdal (2022-dba9ba8e2b)	Nessus	Fedora Local Security Checks	12/22/2022	11/14/2024	critical
211098	Fedora 37 : heimdal (2022-2c77cee4b5)	Nessus	Fedora Local Security Checks	11/14/2024	11/14/2024	critical
169244	Fedora 35 : heimdal (2022-cbbd105d08)	Nessus	Fedora Local Security Checks	12/23/2022	11/14/2024	critical
180339	FreeBSD : FreeBSD -- Multiple vulnerabilities in Heimdal (97c1b0f7-47b9-11ee-8e38-002590c1f29c)	Nessus	FreeBSD Local Security Checks	8/31/2023	8/31/2023	critical
203873	Photon OS 3.0: Samba PHSA-2023-3.0-0603	Nessus	PhotonOS Local Security Checks	7/24/2024	7/24/2024	critical
215436	Azure Linux 3.0 Security Update: heimdal / samba (CVE-2022-44640)	Nessus	Azure Linux Local Security Checks	2/10/2025	2/10/2025	critical
170095	openSUSE 15 Security Update : libheimdal (openSUSE-SU-2023:0019-1)	Nessus	SuSE Local Security Checks	1/17/2023	9/7/2023	critical

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