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Vulnerability record · CVE-2009-4496 · published 13 January 2010

CVE-2009-4496: Boa improper input validation vulnerability

Boa · Boa

Boa 0.94.14rc21 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

5.0 CVSS 2.0 Medium EPSS 12% · top 3.9% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Boa 0.94.14rc21 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/041271.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/041274.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/041285.html
http://secunia.com/advisories/39775
http://www.securityfocus.com/archive/1/508830/100/0/threaded
http://www.securityfocus.com/bid/37718
http://www.ush.it/team/ush/hack_httpd_escape/adv.txt Exploit
http://www.vupen.com/english/advisories/2010/1133
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/041271.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/041274.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-May/041285.html
http://secunia.com/advisories/39775
http://www.securityfocus.com/archive/1/508830/100/0/threaded
http://www.securityfocus.com/bid/37718
http://www.ush.it/team/ush/hack_httpd_escape/adv.txt Exploit
http://www.vupen.com/english/advisories/2010/1133

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-44117Boa sql injection vulnerabilityBoa 0.94.14rc21 is vulnerable to SQL Injection via username. NOTE: the is disputed by multiple third parties because Boa does not ship with any suppo…EPSS 0.73%9.8CVE-2018-21027Boa memory buffer overflow vulnerabilityBoa through 0.94.14rc21 allows remote attackers to trigger an out-of-memory (OOM) condition because malloc is mishandled.EPSS 2.4%7.5CVE-2021-33558Boa vulnerabilityBoa 0.94.13 allows remote attackers to obtain sensitive information via a misconfiguration involving backup.html, preview.html, js/log.js, log.html, …EPSS 12%7.5CVE-2018-21028Boa vulnerabilityBoa through 0.94.14rc21 allows remote attackers to trigger a memory leak because of missing calls to the free function.EPSS 2.1%7.5CVE-2017-9833Boa wapopen path traversal via FILECAMERA reads files as rootA path traversal flaw is reported in /cgi-bin/wapopen in Boa 0.94.14rc21, where the FILECAMERA GET variable accepts "../.." sequences and can read fi…EPSS 68%analysed7.5CVE-2016-9564Boa improper input validation vulnerabilityBuffer overflow in send_redirect() in Boa Webserver 0.92r allows remote attackers to DoS via an HTTP GET request requesting a long URI with only '/' …EPSS 1.4%5.3CVE-2022-45956Boa incorrect authorization vulnerabilityBoa Web Server versions 0.94.13 through 0.94.14 fail to validate the correct security constraint on the HEAD HTTP method allowing everyone to bypass …EPSS 0.82%9.5CVE-2026-88771Citrix NetScaler Improper Input Validation VulnerabilityImproper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-…KEV

Source: NIST National Vulnerability Database (record CVE-2009-4496), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.