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No exploitation reportedFix available

CVE-2021-33833

No exploitation reported by the sources we read.

  • Published2021-06-09
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

ConnMan (aka Connection Manager) 1.30 through 1.39 has a stack-based buffer overflow in uncompress in dnsproxy.c via NAME, RDATA, or RDLENGTH (for A or AAAA).

Timeline

dates in UTC
  1. 2021-06-0918:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
Intel connection manager
BranchAffectedFixed in
1.x≥ 1.30, ≤ 1.39no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • connmanUbuntu:Pro:18.04:LTSall versions · fixed in 1.35-6ubuntu0.1~esm1
  • connmanUbuntu:Pro:16.04:LTSall versions · fixed in 1.21-1.2+deb8u1ubuntu0.1~esm1
  • connmanUbuntu:22.04:LTSall versions · fixed in 1.36-2.3ubuntu0.1
  • connmanUbuntu:20.04:LTSall versions · fixed in 1.36-2ubuntu0.1
  • connmanopenSUSE:Tumbleweedall versions · fixed in 1.40-2.2
  • connmanMageia:8all versions · fixed in 1.38-2.1.mga8
  • connmanMageia:7all versions · fixed in 1.37-1.2.mga7
  • connmanDebian:14all versions · fixed in 1.36-2.2

3 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-33833 Red Hat Product Security

    connman: stack based buffer overflow in uncompress in dnsproxy.c

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-06-09
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h4g6-6xx4-6g88

Frequently asked questions

What is CVE-2021-33833?

ConnMan (aka Connection Manager) 1.30 through 1.39 has a stack-based buffer overflow in uncompress in dnsproxy.c via NAME, RDATA, or RDLENGTH (for A or AAAA).

Is CVE-2021-33833 actively exploited?

Active exploitation of CVE-2021-33833 has not been confirmed. Its EPSS score was 2.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-33833?

CVE-2021-33833 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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