CVE-2017-5929: QOS.ch Logback before 1.2.0 has a serialization vulnerability affecting the SocketServer and ServerSocketRecei

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADEDOWNGRADEDOWNGRADE

CVE-2017-5929 is a critical-severity flaw (CVSS 9.8) affecting logback, satellite, satellite capsule. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

QOS.ch Logback before 1.2.0 has a serialization vulnerability affecting the SocketServer and ServerSocketReceiver components.

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	7.5% (top 6%)
CISA exploited list	No
Weakness	CWE-502
Published	2017-03-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: qos · redhat

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

Am I affected?

Timeline

2017-03-13 06:59 UTCPublished CVE record published
2026-06-17 01:21 UTCUpdated Record last modified

qos logback UPGRADE

Affected: < 1.2.0

Fixed in: 1.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.2.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade logback

Note

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

redhat satellite DOWNGRADE

Affected: 6.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.4 (Debian / Ubuntu)

apt-cache madison satellite sudo apt install satellite=<VERSION_BEFORE_6.4> sudo apt-mark hold satellite

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

dnf --showduplicates list satellite sudo dnf downgrade satellite-<VERSION_BEFORE_6.4> sudo dnf versionlock add satellite

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.

redhat satellite capsule DOWNGRADE

Affected: 6.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.4

1. Check installed version

apt-cache policy satellite-capsule || rpm -q satellite-capsule || satellite-capsule --version

2. No fixed release: DOWNGRADE to a release before 6.4 (Debian / Ubuntu)

apt-cache madison satellite-capsule sudo apt install satellite-capsule=<VERSION_BEFORE_6.4> sudo apt-mark hold satellite-capsule

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

dnf --showduplicates list satellite-capsule sudo dnf downgrade satellite-capsule-<VERSION_BEFORE_6.4> sudo dnf versionlock add satellite-capsule

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-2017-5929?

logback: upgrade to 1.2.0; satellite: downgrade or apply the listed mitigation; satellite capsule: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-5929 being exploited?

CVE-2017-5929 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-2017-5929 affect?

CVE-2017-5929 affects logback, satellite, satellite capsule. Severity is critical (CVSS 9.8). QOS.ch Logback before 1.2.0 has a serialization vulnerability affecting the SocketServer and ServerSocketReceiver components.

How urgent is CVE-2017-5929?

Priority 68/100. Critical severity; EPSS top 6%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2023-6481 HIGH 7.1 DOWNGRADE A serialization vulnerability in logback receiver component part of logback version 1.4.13, 1.3.13 and 1.2.12
CVE-2023-6378 HIGH 7.1 UPGRADE A serialization vulnerability in logback receiver component part of logback version 1.4.11 allows an attacker
CVE-2021-42550 MEDIUM 6.6 UPGRADE DOWNGRADE In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations f

References

← Back to latest CVEs