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    CVE-2022-42898

    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."

    Published:Nov 15, 2022
    Last Modified:Apr 14, 2025
    EPS:Dec 25, 2022
    EPSS Score:0.08742
    CVSS Score:8.8

    Affected Products

    Vendor
    Heimdal Project
    Product
    Heimdal
    Vendor
    Mit
    Product
    Kerberos 5
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Els
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Redhat
    Product
    Rhev Hypervisor
    Vendor
    Samba
    Product
    Samba

    Exploits

    https://bugzilla.samba.org/show_bug.cgi?id=15203https://bugzilla.samba.org/show_bug.cgi?id=15203

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2022-3116 (CVSS 7.5) — The Heimdal Software Kerberos 5 implementation is vulnerable to a null pointer dereferance. An attacker with n…
    CVE-2022-45142 (CVSS 7.5) — The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by …
    CVE-2021-44758 (CVSS 7.5) — Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a preferred…
    CVE-2022-44640 (CVSS 9.8) — Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1…
    CVE-2022-41916 (CVSS 5.9) — Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a den…
    CVE-2019-12098 (CVSS 7.4) — In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permi…
    CVE-2018-16860 (CVSS 7.5) — A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, e…
    CVE-2017-17439 (CVSS 7.5) — In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP pa…
    CVE-2017-6594 (CVSS 7.5) — The transit path validation code in Heimdal before 7.3 might allow attackers to bypass the capath policy prote…
    CVE-2017-11103 (CVSS 8.1) — Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtai…

    References

    https://bugzilla.samba.org/show_bug.cgi?id=15203
    https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
    https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583
    https://security.gentoo.org/glsa/202309-06
    https://security.gentoo.org/glsa/202310-06
    https://security.netapp.com/advisory/ntap-20230216-0008/
    https://security.netapp.com/advisory/ntap-20230223-0001/
    https://web.mit.edu/kerberos/advisories/
    https://web.mit.edu/kerberos/krb5-1.19/
    https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt
    https://www.samba.org/samba/security/CVE-2022-42898.html
    https://bugzilla.samba.org/show_bug.cgi?id=15203
    https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
    https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583
    https://security.gentoo.org/glsa/202309-06
    https://security.gentoo.org/glsa/202310-06
    https://security.netapp.com/advisory/ntap-20230216-0008/
    https://security.netapp.com/advisory/ntap-20230223-0001/
    https://web.mit.edu/kerberos/advisories/
    https://web.mit.edu/kerberos/krb5-1.19/
    https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt
    https://www.samba.org/samba/security/CVE-2022-42898.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High