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CVE-2022-42898 is an integer overflow vulnerability in the Privilege Attribute Certificate (PAC) parsing logic of MIT Kerberos 5 (krb5). It affects releases before 1.19.4 and 1.20.x before 1.20.1. The flaw is located in the krb5_pac_parse function in lib/krb5/krb/pac.c. Crafted PAC data can trigger integer overflows during parsing; on 32-bit platforms this can lead to a resultant heap-based buffer overflow, creating a path to remote code execution in Kerberos-related services such as the KDC, kadmind, or applications acting as GSSAPI or Kerberos application servers. On other platforms, the issue can cause process termination or denial of service. Heimdal before 7.7.1 is reported to contain a similar bug.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A historical Samba-related integer overflow vulnerability in Kerberos/AD DC on 32-bit systems, mentioned only as background.
An integer overflow vulnerability in Kerberos PAC parsing.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.