CVE-2015-1554: kgb-bot 1.33-2 allows remote attackers to cause a denial of service (crash).

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2015-1554 is a high-severity flaw (CVSS 7.5) affecting kgb-bot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

kgb-bot 1.33-2 allows remote attackers to cause a denial of service (crash).

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-20
Published	2017-08-28
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: kgb-bot project

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

Am I affected?

Timeline

2017-08-28 19:29 UTCPublished CVE record published
2026-06-17 00:22 UTCUpdated Record last modified

kgb-bot project kgb-bot DOWNGRADE

Affected: 1.33-2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.33-2

1. Check installed version

apt-cache policy kgb-bot || rpm -q kgb-bot || kgb-bot --version

2. No fixed release: DOWNGRADE to a release before 1.33-2 (Debian / Ubuntu)

apt-cache madison kgb-bot sudo apt install kgb-bot=<VERSION_BEFORE_1.33-2> sudo apt-mark hold kgb-bot

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

dnf --showduplicates list kgb-bot sudo dnf downgrade kgb-bot-<VERSION_BEFORE_1.33-2> sudo dnf versionlock add kgb-bot

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-2015-1554?

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

Is CVE-2015-1554 being exploited?

CVE-2015-1554 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-2015-1554 affect?

CVE-2015-1554 affects kgb-bot. Severity is high (CVSS 7.5). kgb-bot 1.33-2 allows remote attackers to cause a denial of service (crash).

How urgent is CVE-2015-1554?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

References

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