CVE-2021-33833

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.57% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 83.8% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-06-09 17:44Z5 YR AGO

Last updated

2024-08-03 23:58Z2 YR AGO

Reserved

2021-06-03

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

6902619fefb036831ee8a7e783f1a0023f37a35954c9347dfe3223ced7fa3865

• lore.kernel.orghttps://lore.kernel.org/connman/x_refsource_MISC
• www.openwall.com[oss-security] 20210609 connman stack buffer overflow in dnsproxy CVE-2021-33833http://www.openwall.com/lists/oss-security/2021/06/09/1mailing-listx_refsource_MLIST
• security.gentoo.orgGLSA-202107-29https://security.gentoo.org/glsa/202107-29vendor-advisoryx_refsource_GENTOO
• www.openwall.com[oss-security] 20220125 Multiple vulnerabilities in connman's dnsproxy componenthttp://www.openwall.com/lists/oss-security/2022/01/25/1mailing-listx_refsource_MLIST
• lists.debian.org[debian-lts-announce] 20220209 [SECURITY] [DLA 2915-1] connman security updatehttps://lists.debian.org/debian-lts-announce/2022/02/msg00009.htmlmailing-listx_refsource_MLIST