CVE-2017-7562: mit kerberos_5 Improper Authentication
CVSS: 6.5v3.0MediumModified
AliasesSUSE-SU-2018:1425-1
Published 26-07-2018Last modified 05-08-2024
Vulnerability summary
CVE-2017-7562 is a medium (CVSS 6.5) Improper Authentication vulnerability in mit kerberos_5. EPSS estimates a 3.18% chance of exploitation in the next 30 days, higher than 87.8% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.0 (CVE.org)EPSS score
3.18%
0%100%
Low · -0.12 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2Timeline
- 26-07-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances.
CVSS metrics
4 scores · 2 sources · 3 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NSourcesSingle source
Medium 6.5Preferred score · CVE.org (CNA)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NSourcesAll 2 agree
- NVDNIST6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Medium 4.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
3.18%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
-0.12 pp
From 3.30% on 19-09-2026
19-09-202619-10-2026
EPSS score3.18%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat4 products
Suse3 products
- krb5&distro=SUSE Linux Enterprise Server 12 SP1-LTSS< 1.12.1-38.5.3
- krb5&distro=SUSE Linux Enterprise Server 12-LTSS< 1.12.1-38.5.3
- krb5&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP1< 1.12.1-38.5.3
Mit2 products
- kerberos_5≥ 1.0, < 1.16.1
- krb51.16.1
3 vendors · 9 products
References
12 links- github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2X Refsource CONFIRMThird Party Advisory
- github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196X Refsource CONFIRMThird Party Advisory
- github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627dX Refsource CONFIRMThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562X Refsource CONFIRMIssue TrackingPatchThird Party Advisory