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CVE-2025-32743

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty...

9.0 CriticalFix available

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.53%Up 0.5 points since Apr 11, 2025
90%50%10%1%

What each source reports

CVE List Score used 9.0

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Record
CVE-2025-32743
CVSS 3.1
9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-392
Updated
2026-11-02
EUVDEUVD-2025-10687 9.0

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Record
EUVD-2025-10687
CVSS 3.1
9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-r8hx-vf7j-v5q3 9.0

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty...

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Record
GHSA-r8hx-vf7j-v5q3
CVSS 3.1
9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-392
Updated
2026-11-02
NVD 9.0

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Record
CVE-2025-32743
CVSS 3.1
9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-392
Updated
2026-11-02
OSVDEBIAN-CVE-2025-32743 9.0

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Record
DEBIAN-CVE-2025-32743
CVSS 3.1
9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2025-32743 9.0

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Record
UBUNTU-CVE-2025-32743
CVSS 3.1
9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSV No score

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.

Record
CVE-2025-32743
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
connman
Debian:12
 All versions, plus listed versions
1.41-31.42-11.42-21.42-31.42-4
Show 10 moreShow less
1.42-51.43-11.44-11.44-21.44-31.45-11.45-21.45-32.0-12.0-2
 None known
connman
Debian:13
 before 1.44-2
1.44-2
connman
Debian:14
 before 1.44-2
1.44-2
connman
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.21-1.21.21-1.2build11.21-1.2build21.21-1.2+deb8u1build0.16.04.11.21-1.2+deb8u1ubuntu0.1~esm1
 None known
connman
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.35-11.35-21.35-61.35-6ubuntu0.1~esm1
 None known
connman
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.36-2build11.36-2ubuntu0.1
 None known
connman
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.36-2.2build11.36-2.31.36-2.3build11.36-2.3ubuntu0.1
 None known
connman
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.41-31.42-11.42-31.42-51.42-5build21.42-5build3
 None known
connman
Ubuntu:25.10
 All versions, plus listed versions
1.43-11.44-11.44-21.44-3
 None known
connman
Ubuntu:26.10
 All versions, plus listed versions
1.45-32.0-2
 None known
connman
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.44-31.45-21.45-3
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-32743 is a critical vulnerability (CVSS 9.0) in Connman, published April 10, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 44th percentile. Fixed in connman 1.44-2.

References

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