CVE-2006-1356: Stack-based buffer overflow in the count_vcards function in LibVC 3, as used in Rolo, allows user-assisted att

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MEDIUM 5.1DOWNGRADEDOWNGRADE

CVE-2006-1356 is a medium-severity flaw (CVSS 5.1) affecting libvc, rolo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in the count_vcards function in LibVC 3, as used in Rolo, allows user-assisted attackers to execute arbitrary code via a vCard file (e.g. contacts.vcf) containing a long line.

Why this priority

EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.1 (Medium)
EPSS exploit chance	4.5% (top 9%)
CISA exploited list	No
Published	2006-03-22
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: andrew hsu

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

Am I affected?

Timeline

2006-03-22 02:02 UTCPublished CVE record published
2026-06-16 22:22 UTCUpdated Record last modified

andrew hsu libvc DOWNGRADE

Affected: 3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3 (Debian / Ubuntu)

apt-cache madison libvc sudo apt install libvc=<VERSION_BEFORE_3> sudo apt-mark hold libvc

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

dnf --showduplicates list libvc sudo dnf downgrade libvc-<VERSION_BEFORE_3> sudo dnf versionlock add libvc

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.

andrew hsu rolo DOWNGRADE

Affected: 11

Fixed in: no fixed release known

Safe to downgrade to: a release before 11

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 11 (Debian / Ubuntu)

apt-cache madison rolo sudo apt install rolo=<VERSION_BEFORE_11> sudo apt-mark hold rolo

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

dnf --showduplicates list rolo sudo dnf downgrade rolo-<VERSION_BEFORE_11> sudo dnf versionlock add rolo

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: LibVC - '.VCard' 003 Processing Buffer Overflow

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-2006-1356?

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

Is CVE-2006-1356 being exploited?

CVE-2006-1356 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-2006-1356 affect?

CVE-2006-1356 affects libvc, rolo. Severity is medium (CVSS 5.1). Stack-based buffer overflow in the count_vcards function in LibVC 3, as used in Rolo, allows user-assisted attackers to execute arbitrary code via a vCard file (e.g. contacts.vcf) containing a long line.

How urgent is CVE-2006-1356?

Priority 46/100. EPSS top 9%: very likely to be exploited; Public exploit reference

References

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