CVE-2020-11061: In Bareos Director less than or equal to 16.2.10, 17.2.9, 18.2.8, and 19.2.7, a heap overflow allows a malicio

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MEDIUM 6.0WATCHLISTUPGRADEMITIGATE

CVE-2020-11061 is a medium-severity flaw (CVSS 6.0) affecting bareos, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Bareos Director less than or equal to 16.2.10, 17.2.9, 18.2.8, and 19.2.7, a heap overflow allows a malicious client to corrupt the director's memory via oversized digest strings sent during initialization of a verify job. Disabling verify jobs mitigates the problem. This issue is also patched in Bareos versions 19.2.8, 18.2.9 and 17.2.10.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-122, CWE-787
Published	2020-07-10
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: bareos · debian

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

Am I affected?

Timeline

2020-07-10 20:15 UTCPublished CVE record published
2026-06-17 02:48 UTCUpdated Record last modified

bareos bareos UPGRADE

Affected: <= 16.2.10 · >= 17.2.4 and <= 17.2.9 · >= 18.2.5 and <= 18.2.8 · >= 18.4.1 and <= 19.2.7 · 18.2.4 rc1 · 18.2.4 rc2

Fixed in: newer than 19.2.7

Safe to downgrade to: a release before 17.2.4

1. Check installed version

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

2. UPGRADE to newer than 19.2.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bareos

Note

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

3. If no update is available yet, DOWNGRADE to a release before 17.2.4 (Debian / Ubuntu)

apt-cache madison bareos sudo apt install bareos=<VERSION_BEFORE_17.2.4> sudo apt-mark hold bareos

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list bareos sudo dnf downgrade bareos-<VERSION_BEFORE_17.2.4> sudo dnf versionlock add bareos

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.

debian debian linux MITIGATE

Affected: 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2020-11061?

bareos: upgrade to newer than 19.2.7; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-11061 being exploited?

CVE-2020-11061 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-2020-11061 affect?

CVE-2020-11061 affects bareos, debian linux. Severity is medium (CVSS 6.0). In Bareos Director less than or equal to 16.2.10, 17.2.9, 18.2.8, and 19.2.7, a heap overflow allows a malicious client to corrupt the director's memory via oversized digest strings sent during initialization of a verify job. Disabling veri

How urgent is CVE-2020-11061?

Priority 43/100. On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2022-24756 HIGH 7.5 UPGRADE Bareos is open source software for backup, archiving, and recovery of data for operating systems
CVE-2022-24755 HIGH 8.1 UPGRADE Bareos is open source software for backup, archiving, and recovery of data for operating systems
CVE-2020-4042 MEDIUM 6.8 UPGRADE Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without kn

References

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