CVE-2019-25033: debian debian_linux Integer Overflow or Wraparound
CVSS: 9.8v3.1CriticalModified
AliasesRHSA-2024:0749UBUNTU-CVE-2019-25033DEBIAN-CVE-2019-25033
Published 27-04-2021Last modified 05-08-2024
Vulnerability summary
CVE-2019-25033 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in debian debian_linux. EPSS estimates a 2.37% chance of exploitation in the next 30 days, higher than 83.5% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
2.37%
0%100%
Low · +0.59 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 7 · Related 5Timeline
- 27-04-2021PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Unbound before 1.9.5 allows an integer overflow in the regional allocator via the ALIGN_UP macro. 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
CVSS metrics
5 scores · 4 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · Red hatEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.37%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
+0.59 pp
From 1.78% on 19-09-2026
19-09-202619-10-2026
EPSS score2.37%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat8 products
- python3-unbound< 0:1.7.3-17.el8_6.1
- python3-unbound-debuginfo< 0:1.7.3-17.el8_6.1
- unbound< 0:1.7.3-17.el8_6.1
- unbound-debuginfo< 0:1.7.3-17.el8_6.1
- unbound-debugsource< 0:1.7.3-17.el8_6.1
Debian2 products
- unbound< 1.9.6-1
- debian_linuxEOL9.0
Nlnetlabs1 product
- unbound< 1.9.5
Ubuntu1 product
- unbound< 1.6.7-1ubuntu2.4 | < 1.9.4-2ubuntu1.2
4 vendors · 12 products
References
13 links- ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/X Refsource MISCREPORTNot ApplicableThird Party Advisory
lists.debian.org/debian-lts-announce/2021/05/msg00007.htmlMailing ListX Refsource MLISTThird Party Advisory