CVE-2015-2063: Integer overflow in unace 1.2b allows remote attackers to cause a denial of service (crash) via a small file h

This month

MEDIUM 4.3DOWNGRADE

CVE-2015-2063 is a medium-severity flaw (CVSS 4.3) affecting unace. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer overflow in unace 1.2b allows remote attackers to cause a denial of service (crash) via a small file header in an ace archive, which triggers a buffer overflow.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-189
Published	2015-03-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: winace

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-03-09 14:59 UTCPublished CVE record published
2026-06-17 00:23 UTCUpdated Record last modified

winace unace DOWNGRADE

Affected: 1.2b

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2b

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2b (Debian / Ubuntu)

apt-cache madison unace sudo apt install unace=<VERSION_BEFORE_1.2b> sudo apt-mark hold unace

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

dnf --showduplicates list unace sudo dnf downgrade unace-<VERSION_BEFORE_1.2b> sudo dnf versionlock add unace

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-2015-2063?

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

Is CVE-2015-2063 being exploited?

CVE-2015-2063 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-2015-2063 affect?

CVE-2015-2063 affects unace. Severity is medium (CVSS 4.3). Integer overflow in unace 1.2b allows remote attackers to cause a denial of service (crash) via a small file header in an ace archive, which triggers a buffer overflow.

How urgent is CVE-2015-2063?

Priority 42/100. Public exploit reference

References

← Back to latest CVEs