| Name | CVE-2010-4021 |
| Description | The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the use of TGT credentials for armoring TGS requests, which might allow remote authenticated users to impersonate a client by rewriting an inner request, aka a "KrbFastReq forgery issue." |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| krb5 (PTS) | jessie, jessie (lts) | 1.12.1+dfsg-19+deb8u9 | fixed |
| stretch (security) | 1.15-1+deb9u3 | fixed | |
| stretch (lts), stretch | 1.15-1+deb9u6 | fixed | |
| buster, buster (lts) | 1.17-3+deb10u7 | fixed | |
| buster (security) | 1.17-3+deb10u6 | fixed | |
| bullseye (security), bullseye | 1.18.3-6+deb11u5 | fixed | |
| bookworm (security), bookworm | 1.20.1-2+deb12u2 | fixed | |
| sid, trixie | 1.21.3-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| krb5 | source | lenny | (not affected) | |||
| krb5 | source | (unstable) | 1.8+dfsg~alpha1-1 |
[lenny] - krb5 <not-affected> (Only affects 1.7.x)