CVE-2003-1568: GoAhead WebServer before 2.1.6 allows remote attackers to cause a denial of service (NULL pointer dereference

Q: How do I fix CVE-2003-1568?

goahead webserver: downgrade or apply the listed mitigation; goahead webserver: upgrade to newer than 2.1.5. Exact commands for each OS are on this page.

Q: Is CVE-2003-1568 being exploited?

CVE-2003-1568 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2003-1568 affect?

CVE-2003-1568 affects goahead webserver, goahead webserver. Severity is medium (CVSS 5.0). GoAhead WebServer before 2.1.6 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an invalid URL, related to the websSafeUrl function.

Q: How urgent is CVE-2003-1568?

Priority 37/100. No elevated risk signals yet.

Routine

MEDIUM 5.0DOWNGRADEUPGRADE

CVE-2003-1568 is a medium-severity flaw (CVSS 5.0) affecting goahead webserver, goahead webserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GoAhead WebServer before 2.1.6 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an invalid URL, related to the websSafeUrl function.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-20
Published	2009-02-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: goahead · goahead software

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

Am I affected?

Timeline

2009-02-06 19:30 UTCPublished CVE record published
2026-06-16 22:04 UTCUpdated Record last modified

goahead goahead webserver DOWNGRADE

Affected: 2.0 · 2.1 · 2.1.1 · 2.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy goahead-webserver || rpm -q goahead-webserver || goahead-webserver --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison goahead-webserver sudo apt install goahead-webserver=<VERSION_BEFORE_2.0> sudo apt-mark hold goahead-webserver

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

dnf --showduplicates list goahead-webserver sudo dnf downgrade goahead-webserver-<VERSION_BEFORE_2.0> sudo dnf versionlock add goahead-webserver

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.

goahead software goahead webserver UPGRADE

Affected: <= 2.1.5 · 2.1.3 · 2.1.4

Fixed in: newer than 2.1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy goahead-webserver || rpm -q goahead-webserver || goahead-webserver --version

2. UPGRADE to newer than 2.1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade goahead-webserver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade goahead-webserver

Note

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

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-2003-1568?

goahead webserver: downgrade or apply the listed mitigation; goahead webserver: upgrade to newer than 2.1.5. Exact commands for each OS are on this page.

Is CVE-2003-1568 being exploited?

CVE-2003-1568 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-2003-1568 affect?

CVE-2003-1568 affects goahead webserver, goahead webserver. Severity is medium (CVSS 5.0). GoAhead WebServer before 2.1.6 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an invalid URL, related to the websSafeUrl function.

How urgent is CVE-2003-1568?

Priority 37/100. No elevated risk signals yet.

Related CVEs

CVE-2011-4273 MEDIUM 4.3 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in GoAhead Webserver 2.18 allow remote attackers to inject
CVE-2009-5111 MEDIUM 5.0 MITIGATE GoAhead WebServer allows remote attackers to cause a denial of service (daemon outage) via partial HTTP reques
CVE-2003-1569 MEDIUM 5.0 UPGRADE GoAhead WebServer before 2.1.5 on Windows 95, 98, and ME allows remote attackers to cause a denial of service
CVE-2002-2431 HIGH 7.5 UPGRADE Unspecified vulnerability in GoAhead WebServer before 2.1.4 allows remote attackers to cause "incorrect behavi
CVE-2002-2430 MEDIUM 5.0 UPGRADE GoAhead WebServer before 2.1.1 allows remote attackers to cause a denial of service (CPU consumption) by perfo

References

← Back to latest CVEs