critical
CVE-2019-25034
unbound: integer overflow in sldns_str2wire_dname_buf_origin can lead to an out-of-bounds write
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Trivy's own label is CRITICAL. Rated critical by NVD, Photon OS. Rated lower by Red Hat (medium), Amazon (medium), Oracle (medium), Rocky Linux (medium), Ubuntu (medium).
Description
Unbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| Photon OS 1.0 | unbound | 1.6.8-4.ph1 |
| Photon OS 2.0 | unbound | 1.6.8-4.ph2 |
| Photon OS 3.0 | unbound | 1.13.1-1.ph3 |
| Photon OS 5.0 | unbound, unbound-devel, unbound-docs | 1.26.0-1.ph5 |
| amazon linux 2 | python2-unbound, python3-unbound, unbound and 3 more | 1.7.3-15.amzn2.0.1 |
| debian 11 | unbound | 1.9.6-1 |
| debian 12 | unbound | 1.9.6-1 |
| debian 13 | unbound | 1.9.6-1 |
| debian 14 | unbound | 1.9.6-1 |
| debian 9 | unbound, unbound1.9 | 1.9.0-2+deb10u2~deb9u2 |
| echo | unbound | 1.9.6-1 |
| Oracle Linux 8 | python3-unbound, unbound, unbound-devel and 1 more | 1.7.3-15.el8 |
Show all 35 entries from 18 sources
| Source | Package | Fixed in |
|---|---|---|
| Photon OS 1.0 | unbound | 1.6.8-4.ph1 |
| Photon OS 2.0 | unbound | 1.6.8-4.ph2 |
| Photon OS 3.0 | unbound | 1.13.1-1.ph3 |
| Photon OS 5.0 | unbound | 1.26.0-1.ph5 |
| Photon OS 5.0 | unbound-devel | 1.26.0-1.ph5 |
| Photon OS 5.0 | unbound-docs | 1.26.0-1.ph5 |
| amazon linux 2 | python2-unbound | 1.7.3-15.amzn2.0.1 |
| amazon linux 2 | python3-unbound | 1.7.3-15.amzn2.0.1 |
| amazon linux 2 | unbound | 1.7.3-15.amzn2.0.1 |
| amazon linux 2 | unbound-debuginfo | 1.7.3-15.amzn2.0.1 |
| amazon linux 2 | unbound-devel | 1.7.3-15.amzn2.0.1 |
| amazon linux 2 | unbound-libs | 1.7.3-15.amzn2.0.1 |
| debian 11 | unbound | 1.9.6-1 |
| debian 12 | unbound | 1.9.6-1 |
| debian 13 | unbound | 1.9.6-1 |
| debian 14 | unbound | 1.9.6-1 |
| debian 9 | unbound | no fix listed |
| debian 9 | unbound1.9 | 1.9.0-2+deb10u2~deb9u2 |
| echo | unbound | 1.9.6-1 |
| Oracle Linux 8 | python3-unbound | 1.7.3-15.el8 |
| Oracle Linux 8 | unbound | 1.7.3-15.el8 |
| Oracle Linux 8 | unbound-devel | 1.7.3-15.el8 |
| Oracle Linux 8 | unbound-libs | 1.7.3-15.el8 |
| Red Hat | unbound | no fix listed |
| Red Hat | unbound-devel | no fix listed |
| Red Hat | unbound-libs | no fix listed |
| Red Hat | unbound-python | no fix listed |
| rocky 8 | python3-unbound | 1.7.3-15.el8 |
| rocky 8 | unbound | 1.7.3-15.el8 |
| rocky 8 | unbound-devel | 1.7.3-15.el8 |
| rocky 8 | unbound-libs | 1.7.3-15.el8 |
| ubuntu 18.04 | unbound | 1.6.7-1ubuntu2.4 |
| ubuntu 18.04-ESM | unbound | 1.6.7-1ubuntu2.4 |
| ubuntu 20.04 | unbound | 1.9.4-2ubuntu1.2 |
| ubuntu 20.04-ESM | unbound | 1.9.4-2ubuntu1.2 |
References
- https://access.redhat.com/errata/RHSA-2021:1853
- https://access.redhat.com/security/cve/CVE-2019-25034
- https://bugzilla.redhat.com/show_bug.cgi?id=1714175
- https://bugzilla.redhat.com/show_bug.cgi?id=1842837
- https://bugzilla.redhat.com/show_bug.cgi?id=1850460
- https://bugzilla.redhat.com/show_bug.cgi?id=1878761
- https://bugzilla.redhat.com/show_bug.cgi?id=1954772
- https://bugzilla.redhat.com/show_bug.cgi?id=1954778
All 37 references
- https://bugzilla.redhat.com/show_bug.cgi?id=1954780
- https://bugzilla.redhat.com/show_bug.cgi?id=1954782
- https://bugzilla.redhat.com/show_bug.cgi?id=1954794
- https://bugzilla.redhat.com/show_bug.cgi?id=1954796
- https://bugzilla.redhat.com/show_bug.cgi?id=1954797
- https://bugzilla.redhat.com/show_bug.cgi?id=1954799
- https://bugzilla.redhat.com/show_bug.cgi?id=1954801
- https://bugzilla.redhat.com/show_bug.cgi?id=1954804
- https://creativecommons.org/licenses/by/4.0/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25032
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25034
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25035
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25036
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25037
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25038
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25039
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25040
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25041
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25042
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28935
- https://errata.rockylinux.org/RLSA-2021:1853
- https://linux.oracle.com/cve/CVE-2019-25034.html
- https://linux.oracle.com/errata/ELSA-2021-1853.html
- https://lists.debian.org/debian-lts-announce/2021/05/msg00007.html
- https://nvd.nist.gov/vuln/detail/CVE-2019-25034
- https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
- https://security.netapp.com/advisory/ntap-20210507-0007/
- https://ubuntu.com/security/notices/USN-4938-1
- https://www.cve.org/CVERecord?id=CVE-2019-25034