CVE-2017-11368
CVE-2017-11368 is a medium-severity vulnerability in Mit Kerberos with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-617.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- CVSS v2: 4.0
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-617
- Affected product: Mit Kerberos
- Published:
- Last modified:
Description
In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.
Frequently asked questions
- What is CVE-2017-11368?
- In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.
- How severe is CVE-2017-11368?
- CVE-2017-11368 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2017-11368 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-11368?
- CVE-2017-11368 primarily affects Mit Kerberos. In total, 51 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2017-11368?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2017-11368 published?
- CVE-2017-11368 was published on 2017-08-09 and last updated on 2026-06-17.
References
- http://www.securityfocus.com/bid/100291
- https://access.redhat.com/errata/RHSA-2018:0666
- https://github.com/krb5/krb5/commit/ffb35baac6981f9e8914f8f3bffd37f284b85970
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HNWXM6OQU7G23MG7XWIOBRGP43ECLDT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBUTXMNZWMVJLQ4NDX5OQFPUVCJRLV3W/
Affected products (51)
- cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:26:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos:5-1.13.7:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.7:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.7.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.4:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.5:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.8.6:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.9:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.9.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.9.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.9.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.9.4:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.10.4:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.4:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.11.5:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.12:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.12.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.12.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.12.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:*
- cpe:2.3:a:mit:kerberos_5:1.14:alpha1:*:*:*:*:*:*
More vulnerabilities in Mit Kerberos
- CVE-2009-4212 — Critical (CVSS 10.0): Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the crypto library in MIT Kerberos 5…
- CVE-2004-0523 — Critical (CVSS 10.0): Multiple buffer overflows in krb5_aname_to_localname for MIT Kerberos 5 (krb5) 1.3.3 and earlier allow remote attackers…
- CVE-2001-0554 — Critical (CVSS 10.0): Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute…
- CVE-2000-0389 — Critical (CVSS 10.0): Buffer overflow in krb_rd_req function in Kerberos 4 and 5 allows remote attackers to gain root privileges.
- CVE-2000-0390 — Critical (CVSS 10.0): Buffer overflow in krb425_conv_principal function in Kerberos 5 allows remote attackers to gain root privileges.
- CVE-2000-0391 — Critical (CVSS 10.0): Buffer overflow in krshd in Kerberos 5 allows remote attackers to gain root privileges.
All CVEs affecting Mit Kerberos →
Other CWE-617 (Reachable Assertion) vulnerabilities
- CVE-2020-3615 — Critical (CVSS 9.8): Valid deauth/disassoc frames is dropped in case if RMF is enabled and some rouge peer keep on sending rogue…
- CVE-2019-9795 — Critical (CVSS 9.8): A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by…
- CVE-2026-31739 — High (CVSS 8.8): In the Linux kernel, the following vulnerability has been resolved: crypto: tegra - Add missing CRYPTO_ALG_ASYNC The…
- CVE-2020-12417 — High (CVSS 8.8): Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in…
- CVE-2020-6623 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__cff_get_index.
- CVE-2020-6619 — High (CVSS 8.8): stb stb_truetype.h through 1.22 has an assertion failure in stbtt__buf_seek.