HOMEVULNERABILITIESCVE-2004-0842
HIGHPOC

CVE-2004-0842

NVD-CWE-OtherPublished: December 23, 2004· Updated: Jun 16, 2026

7.5
CVSS v3.1

Official Description

Internet Explorer 6.0 SP1 and earlier, and possibly other versions, allows remote attackers to cause a denial of service (application crash from "memory corruption") via certain malformed Cascading Style Sheet (CSS) elements that trigger heap-based buffer overflows, as demonstrated using the "<STYLE>@;/*" string, possibly due to a missing comment terminator that may cause an invalid length to trigger a large memory copy operation, aka the "CSS Heap Memory Corruption Vulnerability."

NVD Source

Technical Analysis

CVE-2004-0842 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2004-0842. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityP
IntegrityP
AvailabilityP
AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected Vendors & Products

avaya5 product(s)
ip600 media serversdefinity one media servers3400s8100modular messaging message storage server
Microsoft2 product(s)
ieinternet explorer
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.securityfocus.com/bid/10816
PATCHhttp://www.securityfocus.com/bid/10816
ADVISORYhttp://www.ecqurity.com/adv/IEstyle.html
ADVISORYhttp://www.ecqurity.com/adv/IEstyle.html

All References (34)

→
http://marc.info/?l=bugtraq&m=109107496214572&w=2
→
http://marc.info/?l=full-disclosure&m=109060455614702&w=2
→
http://marc.info/?l=full-disclosure&m=109102919426844&w=2
→
http://secunia.com/advisories/12806
→
http://www.ciac.org/ciac/bulletins/p-006.shtml
→
http://www.ecqurity.com/adv/IEstyle.htmlExploit · Vendor Advisory
→
http://www.kb.cert.org/vuls/id/291304US Government Resource
→
http://www.securiteam.com/exploits/5NP042KF5A.html
→
http://www.securityfocus.com/bid/10816Exploit · Patch · Vendor Advisory
→
http://www.us-cert.gov/cas/techalerts/TA04-293A.htmlUS Government Resource
→
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-038
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/16675
→
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2906
→
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3372
→
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4169

Quick Facts

CVE IDCVE-2004-0842
CVSS Score7.5 / 10
SeverityHIGH
WeaknessNVD-CWE-Other
CISA KEVNo
ExploitPOC
Affected2 vendor(s)
PublishedDec 23, 2004

Related CVEs (NVD-CWE-Other)

CVE-2011-2159
10.0
CVE-2011-4733
10.0
CVE-2011-0385
10.0
CVE-2011-2158
10.0
CVE-2011-4732
10.0
CVE-2011-4743
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2004-0842 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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