CVE-2006-2442: kphone 4.2 creates .qt/kphonerc with world-readable permissions, which allows local users to read usernames an

Routine

MEDIUM 4.6DOWNGRADE

CVE-2006-2442 is a medium-severity flaw (CVSS 4.6) affecting kphone. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

kphone 4.2 creates .qt/kphonerc with world-readable permissions, which allows local users to read usernames and SIP passwords.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Published	2006-05-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kphone

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-05-18 10:02 UTCPublished CVE record published
2026-06-16 22:25 UTCUpdated Record last modified

kphone kphone DOWNGRADE

Affected: 4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2

1. Check installed version

apt-cache policy kphone || rpm -q kphone || kphone --version

2. No fixed release: DOWNGRADE to a release before 4.2 (Debian / Ubuntu)

apt-cache madison kphone sudo apt install kphone=<VERSION_BEFORE_4.2> sudo apt-mark hold kphone

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kphone sudo dnf downgrade kphone-<VERSION_BEFORE_4.2> sudo dnf versionlock add kphone

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2006-2442?

kphone: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-2442 being exploited?

CVE-2006-2442 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2006-2442 affect?

CVE-2006-2442 affects kphone. Severity is medium (CVSS 4.6). kphone 4.2 creates .qt/kphonerc with world-readable permissions, which allows local users to read usernames and SIP passwords.

How urgent is CVE-2006-2442?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2004-1940 MEDIUM 5.0 UPGRADE sipclient.cpp in KPhone 4.0.1 and earlier allows remote attackers to cause a denial of service (crash) via a S

References

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