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Vulnerability record · CVE-2008-3906 · published 4 September 2008

CVE-2008-3906: Mono improper input validation vulnerability

Mono · Mono

CRLF injection vulnerability in Sys.Web in Mono 2.0 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the query string.

4.3 CVSS 2.0 Medium EPSS 7.1% · top 6.0% CWE-20 · Improper input validation
4.3CVSS 2.0 base score
7.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
22References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

CRLF injection vulnerability in Sys.Web in Mono 2.0 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the query string.

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

Affected products

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

References

LinkTags
http://secunia.com/advisories/31643 Vendor Advisory
http://secunia.com/advisories/36494
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0286
http://www.mandriva.com/security/advisories?name=MDVSA-2008:210
http://www.openwall.com/lists/oss-security/2008/08/27/6
http://www.securityfocus.com/archive/1/496845/100/0/threaded
http://www.securityfocus.com/bid/30867 Exploit
http://www.vupen.com/english/advisories/2008/2443
https://bugzilla.novell.com/show_bug.cgi?id=418620
https://exchange.xforce.ibmcloud.com/vulnerabilities/44740
https://usn.ubuntu.com/826-1/
http://secunia.com/advisories/31643 Vendor Advisory
http://secunia.com/advisories/36494
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0286
http://www.mandriva.com/security/advisories?name=MDVSA-2008:210
http://www.openwall.com/lists/oss-security/2008/08/27/6
http://www.securityfocus.com/archive/1/496845/100/0/threaded
http://www.securityfocus.com/bid/30867 Exploit
http://www.vupen.com/english/advisories/2008/2443
https://bugzilla.novell.com/show_bug.cgi?id=418620
https://exchange.xforce.ibmcloud.com/vulnerabilities/44740
https://usn.ubuntu.com/826-1/

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Related vulnerabilities

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

7.5CVE-2010-4254Mono improper input validation vulnerabilityMono, when Moonlight before 2.3.0.1 or 2.99.x before 2.99.0.10 is used, does not properly validate arguments to generic methods, which allows remote …EPSS 14%7.5CVE-2007-5197Mono memory buffer overflow vulnerabilityBuffer overflow in the Mono.Math.BigInteger class in Mono 1.2.5.1 and earlier allows context-dependent attackers to execute arbitrary code via unspec…EPSS 3.6%6.9CVE-2010-4159Mono vulnerabilityUntrusted search path vulnerability in metadata/loader.c in Mono 2.8 and earlier allows local users to gain privileges via a Trojan horse shared libr…EPSS 0.35%6.8CVE-2011-0991Mono vulnerabilityUse-after-free vulnerability in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, allows remote attackers to cause a denial of serv…EPSS 2.9%6.2CVE-2006-5072Mono vulnerabilityThe System.CodeDom.Compiler classes in Novell Mono create temporary files with insecure permissions, which allows local users to overwrite arbitrary …EPSS 0.46%5.8CVE-2011-0989Mono permissions and access controls vulnerabilityThe RuntimeHelpers.InitializeArray method in metadata/icall.c in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, does not properl…EPSS 2.7%5.8CVE-2011-0990Mono race condition vulnerabilityRace condition in the FastCopy optimization in the Array.Copy method in metadata/icall.c in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.…EPSS 2.2%5.8CVE-2011-0992Mono vulnerabilityUse-after-free vulnerability in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, allows remote attackers to cause a denial of serv…EPSS 2.7%

Source: NIST National Vulnerability Database (record CVE-2008-3906), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.