CRITICAL
CVE-2008-5021
CWE-362Published: November 13, 2008· Updated: Jun 16, 2026
9.3
CVSS v3.1
Official Description
nsFrameManager in Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying properties of a file input element while it is still being initialized, then using the blur method to access uninitialized memory.
Technical Analysis
CVE-2008-5021 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.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:M/Au:N/C:C/I:C/A:C
Affected Vendors & Products
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
Mozilla3 product(s)
firefoxseamonkeythunderbird
novell2 product(s)
linux desktopopen enterprise server
openSUSE1 product(s)
opensuse
SUSE4 product(s)
linux enterprise debuginfolinux enterprise desktoplinux enterprise serverlinux enterprise software development kit
Source: NVD CPE · 20 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
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
ADVISORYhttp://ubuntu.com/usn/usn-667-1
ADVISORYhttp://ubuntu.com/usn/usn-667-1
All References (76)
→
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00004.htmlMailing List · Third Party Advisory
→
http://secunia.com/advisories/32684Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32693Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32694Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32695Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32713Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32714Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32715Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32721Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32778Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32798Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32845Broken Link · Third Party Advisory
→
http://secunia.com/advisories/32853Broken Link · Third Party Advisory
→
http://secunia.com/advisories/33433Broken Link · Third Party Advisory
→
http://secunia.com/advisories/33434Broken Link · Third Party Advisory
Quick Facts
CVE IDCVE-2008-5021
CVSS Score9.3 / 10
SeverityCRITICAL
WeaknessCWE-362
CISA KEVNo
Affected7 vendor(s)
PublishedNov 13, 2008
Related CVEs (CWE-362)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2008-5021 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.