CVE-2017-17663: The htpasswd implementation of mini_httpd before v1.28 and of thttpd before v2.28 is affected by a buffer over

Q: How do I fix CVE-2017-17663?

mini httpd: upgrade to 1.28; thttpd: upgrade to 2.28. Exact commands for each OS are on this page.

Q: Is CVE-2017-17663 being exploited?

CVE-2017-17663 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-2017-17663 affect?

CVE-2017-17663 affects mini httpd, thttpd. Severity is critical (CVSS 9.8). The htpasswd implementation of mini_httpd before v1.28 and of thttpd before v2.28 is affected by a buffer overflow that can be exploited remotely to perform code execution.

Q: How urgent is CVE-2017-17663?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADEUPGRADE

CVE-2017-17663 is a critical-severity flaw (CVSS 9.8) affecting mini httpd, thttpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The htpasswd implementation of mini_httpd before v1.28 and of thttpd before v2.28 is affected by a buffer overflow that can be exploited remotely to perform code execution.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-119
Published	2018-02-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: acme

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

Am I affected?

Timeline

2018-02-06 17:29 UTCPublished CVE record published
2026-06-17 01:11 UTCUpdated Record last modified

acme mini httpd UPGRADE

Affected: < 1.28

Fixed in: 1.28

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mini-httpd || rpm -q mini-httpd || mini-httpd --version

2. UPGRADE to 1.28 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mini-httpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mini-httpd

Note

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

acme thttpd UPGRADE

Affected: < 2.28

Fixed in: 2.28

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.28 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade thttpd

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-2017-17663?

mini httpd: upgrade to 1.28; thttpd: upgrade to 2.28. Exact commands for each OS are on this page.

Is CVE-2017-17663 being exploited?

CVE-2017-17663 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-2017-17663 affect?

CVE-2017-17663 affects mini httpd, thttpd. Severity is critical (CVSS 9.8). The htpasswd implementation of mini_httpd before v1.28 and of thttpd before v2.28 is affected by a buffer overflow that can be exploited remotely to perform code execution.

How urgent is CVE-2017-17663?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Apache HTTP Server vulnerabilities

Related CVEs

CVE-2015-1548 MEDIUM 5.0 UPGRADE mini_httpd 1.21 and earlier allows remote attackers to obtain sensitive information from process memory via an
CVE-2009-4490 MEDIUM 5.0 DOWNGRADE mini_httpd 1.19 writes data to a log file without sanitizing non-printable characters, which might allow remot
CVE-2001-0893 MEDIUM 5.0 UPGRADE Acme mini_httpd before 1.16 allows remote attackers to view sensitive files under the document root (such as .

References

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