MEDIUM
CVE-2010-4020
CWE-310Published: December 2, 2010· Updated: Jun 16, 2026
6.3
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2010-4020 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Affected Vendors & Products
mit1 product(s)
kerberos 5
Source: NVD CPE · 4 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (46)
→
http://secunia.com/advisories/42399Vendor Advisory
→
→
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.htmlPatch · Vendor Advisory
Quick Facts
CVE IDCVE-2010-4020
CVSS Score6.3 / 10
SeverityMEDIUM
WeaknessCWE-310
CISA KEVNo
Affected1 vendor(s)
PublishedDec 2, 2010
Related CVEs (CWE-310)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2010-4020 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.