CVE-2010-4020
Published: 2 December 2010
MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.
Notes
| Author | Note |
|---|---|
| mdeslaur | 1.8 and newer |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
krb5 Launchpad, Ubuntu, Debian |
dapper |
Not vulnerable
(1.4.3-5ubuntu0.11)
|
| hardy |
Not vulnerable
(1.6.dfsg.3~beta1-2ubuntu1.5)
|
|
| karmic |
Not vulnerable
(1.7dfsg~beta3-1ubuntu0.6)
|
|
| lucid |
Released
(1.8.1+dfsg-2ubuntu0.4)
|
|
| maverick |
Released
(1.8.1+dfsg-5ubuntu0.2)
|
|
| upstream |
Needs triage
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | Low |
| Vector | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |