CVE-2021-20308: debian debian_linux Integer Overflow or Wraparound
Modified
AliasesopenSUSE-SU-2021:0893-1openSUSE-SU-2021:0895-1openSUSE-SU-2021:1266-1UBUNTU-CVE-2021-20308DEBIAN-CVE-2021-20308openSUSE-SU-2021:0882-1openSUSE-SU-2024:10848-1
Published 05-04-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-20308 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in debian debian_linux. EPSS estimates a 2.48% chance of exploitation in the next 30 days, higher than 84.4% of scored vulnerabilities. 2 public exploits are recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
2.48%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2github, reference
Advisory lineage
Upstream 0 · Downstream 4 · Related 2Timeline
- 05-04-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Integer overflow in the htmldoc 1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service that is similar to CVE-2017-9181.
CVSS metrics
4 scores · 3 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 3 agree
- 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
2.48%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.48% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
2 foundHtmldoc
Maturity: poc
Exploit Reference (bugzilla.redhat.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Suse3 products
- htmldoc&distro=SUSE Package Hub 12 SP1< 1.8.28-6.1
- htmldoc&distro=SUSE Package Hub 15 SP1< 1.9.12-bp151.4.3.1
- htmldoc&distro=SUSE Package Hub 15 SP2< 1.9.12-bp152.4.3.1
Debian2 products
- htmldoc< 1.9.11-3
- debian_linuxEOL9.0
Opensuse2 products
- htmldoc&distro=openSUSE Leap 15.2< 1.9.12-lp152.4.3.1
- htmldoc&distro=openSUSE Tumbleweed< 1.9.12-1.2
Htmldoc_project1 product
- htmldoc≤ 1.9.11
Ubuntu1 product
- htmldoc< 1.8.27-8ubuntu1+esm3 | < 1.8.27-8ubuntu1.1+esm2 | < 1.9.2-1ubuntu0.2+esm1 | < 1.9.7-1ubuntu0.3+esm1
5 vendors · 9 products
References
13 links- github.com/michaelrsweet/htmldoc/issues/423X Refsource MISCREPORTExploitIssue TrackingThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=1946289X Refsource MISCREPORTExploitIssue TrackingThird Party Advisory
lists.debian.org/debian-lts-announce/2021/07/msg00000.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.opensuse.org/archives/…Advisory
- lists.opensuse.org/archives/…Advisory
- lists.opensuse.org/archives/…Advisory
Show all 13 references
- lists.opensuse.org/archives/…Advisory