CVE-2008-0153: telnetd.exe in Pragma TelnetServer 7.0.4.589 allows remote attackers to cause a denial of service (process cra

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MEDIUM 5.0DOWNGRADE

CVE-2008-0153 is a medium-severity flaw (CVSS 5.0) affecting pragma telnetserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

telnetd.exe in Pragma TelnetServer 7.0.4.589 allows remote attackers to cause a denial of service (process crash and resource exhaustion) via a crafted TELOPT PRAGMA LOGON telnet option, which triggers a NULL pointer dereference.

Why this priority

EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	13.1% (top 4%)
CISA exploited list	No
Weakness	CWE-399
Published	2008-01-09
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: pragma systems

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

Am I affected?

Timeline

2008-01-09 00:46 UTCPublished CVE record published
2026-06-16 22:49 UTCUpdated Record last modified

pragma systems pragma telnetserver DOWNGRADE

Affected: 7.0.4.589

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0.4.589

1. Check installed version

apt-cache policy pragma-telnetserver || rpm -q pragma-telnetserver || pragma-telnetserver --version

2. No fixed release: DOWNGRADE to a release before 7.0.4.589 (Debian / Ubuntu)

apt-cache madison pragma-telnetserver sudo apt install pragma-telnetserver=<VERSION_BEFORE_7.0.4.589> sudo apt-mark hold pragma-telnetserver

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

dnf --showduplicates list pragma-telnetserver sudo dnf downgrade pragma-telnetserver-<VERSION_BEFORE_7.0.4.589> sudo dnf versionlock add pragma-telnetserver

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Pragma TelnetServer 7.0.4.589 - NULL-Pointer Dereference Denial of Service

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-2008-0153?

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

Is CVE-2008-0153 being exploited?

CVE-2008-0153 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-2008-0153 affect?

CVE-2008-0153 affects pragma telnetserver. Severity is medium (CVSS 5.0). telnetd.exe in Pragma TelnetServer 7.0.4.589 allows remote attackers to cause a denial of service (process crash and resource exhaustion) via a crafted TELOPT PRAGMA LOGON telnet option, which triggers a NULL pointer dereference.

How urgent is CVE-2008-0153?

Priority 47/100. EPSS top 4%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2005-1969 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Pragma Systems Telnetserver 6.0 allows remote attackers to inject

References

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