CVE-2013-2221: Heap-based buffer overflow in the ZRtp::storeMsgTemp function in GNU ZRTPCPP before 3.2.0 allows remote attack

Q: How do I fix CVE-2013-2221?

zrtpcpp: upgrade to newer than 3.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2013-2221 being exploited?

CVE-2013-2221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2013-2221 affect?

CVE-2013-2221 affects zrtpcpp. Severity is high (CVSS 7.5). Heap-based buffer overflow in the ZRtp::storeMsgTemp function in GNU ZRTPCPP before 3.2.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a large packet.

Q: How urgent is CVE-2013-2221?

Priority 54/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2013-2221 is a high-severity flaw (CVSS 7.5) affecting zrtpcpp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in the ZRtp::storeMsgTemp function in GNU ZRTPCPP before 3.2.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a large packet.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.3% (top 9%)
CISA exploited list	No
Weakness	CWE-119
Published	2013-10-04
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: wernerd

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

Am I affected?

Timeline

2013-10-04 17:55 UTCPublished CVE record published
2026-06-16 23:52 UTCUpdated Record last modified

wernerd zrtpcpp UPGRADE

Affected: <= 3.2.1 · 2.1.2 · 2.2.0 · 2.3.0 · 3.0.0 alpha · 3.1.0 · 3.2.0

Fixed in: newer than 3.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zrtpcpp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zrtpcpp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2013-2221?

zrtpcpp: upgrade to newer than 3.2.1. Exact commands for each OS are on this page.

Is CVE-2013-2221 being exploited?

CVE-2013-2221 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-2013-2221 affect?

CVE-2013-2221 affects zrtpcpp. Severity is high (CVSS 7.5). Heap-based buffer overflow in the ZRtp::storeMsgTemp function in GNU ZRTPCPP before 3.2.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a large packet.

How urgent is CVE-2013-2221?

Priority 54/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2013-2223 MEDIUM 5.8 UPGRADE GNU ZRTPCPP before 3.2.0 allows remote attackers to obtain sensitive information (uninitialized heap memory) o
CVE-2013-2222 MEDIUM 6.8 UPGRADE Multiple stack-based buffer overflows in GNU ZRTPCPP before 3.2.0 allow remote attackers to cause a denial of

References

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