CVE-2019-12098: debian debian_linux Improper Certificate Validation
CVSS: 7.4v3.1HighModified
AliasesALPINE-CVE-2019-12098UBUNTU-CVE-2019-12098DEBIAN-CVE-2019-12098
Published 15-05-2019Last modified 15-04-2026
Vulnerability summary
CVE-2019-12098 is a high (CVSS 7.4) Improper Certificate Validation vulnerability in debian debian_linux. EPSS estimates a 1.97% chance of exploitation in the next 30 days, higher than 80.1% of scored vulnerabilities.
CVSS score
7.4/10
010
High · v3.1 (CVE.org)EPSS score
1.97%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 15-05-2019PublishedVulnerability first disclosed.
- 15-04-2026Last modifiedVulnerability information updated.
Description
In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.c.
CVSS metrics
7 scores · 5 sources · 3 versionsHigh 7.4Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NSourcesAll 5 agree
- NVDNIST7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · AlpineEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · UbuntuEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · DebianEcosystem advisory · calculated7.4HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
High 7.4Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NSourcesSingle source
Medium 5.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.97%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
0.00 pp
From 1.97% on 19-09-2026
19-09-202619-10-2026
EPSS score1.97%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- heimdal< 7.5.0+dfsg-3
- debian_linuxEOL9.0
Opensuse2 products
- backports_sle15.0 | 15.0:sp1
- leapEOL15.0 | 15.1 | 42.3
Alpine1 product
- heimdal< 7.5.0-r5 | < 7.4.0-r4 | < 7.5.0-r3 | < 7.5.0-r4
Fedoraproject1 product
- fedoraEOL30 | 31
Heimdal_project1 product
- heimdal< 7.6.0
Ubuntu1 product
- heimdal< 1.6~git20131207+dfsg-1ubuntu1.2+esm1 | < 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 | < 7.5.0+dfsg-1ubuntu0.1
6 vendors · 8 products
References
16 links- www.h5l.org/pipermail/heimdal-announce/2019-May/000009.htmlX Refsource CONFIRMPatchVendor AdvisoryREPORT
- github.com/heimdal/heimdal/commit/2f7f3d9960aa6ea21358bdf3687cee5149aa35cfX Refsource CONFIRMPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00002.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-07/msg00003.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory