Vulnerability · Published Jun 9, 2021 · Assigned by mitre
CVE-2021-33833
Critical 9.8
In plain English
A critical-severity security flaw in the connman package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)2.6%top 14.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | connman | 1.36-2.2 | DEBIAN-CVE-2021-33833 |
| Debian:13 | connman | 1.36-2.2 | DEBIAN-CVE-2021-33833 |
| Debian:14 | connman | 1.36-2.2 | DEBIAN-CVE-2021-33833 |
| Ubuntu:22.04:LTS | connman | 1.36-2.3ubuntu0.1 | USN-6236-1 |
Affected products (as reported)
References
- https://lore.kernel.org/connman/ x_refsource_MISC
- [oss-security] 20210609 connman stack buffer overflow in dnsproxy CVE-2021-33833 mailing-list, x_refsource_MLIST
- GLSA-202107-29 vendor-advisory, x_refsource_GENTOO
- [oss-security] 20220125 Multiple vulnerabilities in connman's dnsproxy component mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20220209 [SECURITY] [DLA 2915-1] connman security update mailing-list, x_refsource_MLIST