CRITICAL
CVE-2009-2463
CWE-189Published: July 22, 2009· Updated: Jun 16, 2026
10.0
CVSS v3.1
Official Description
Multiple integer overflows in the (1) PL_Base64Decode and (2) PL_Base64Encode functions in nsprpub/lib/libc/src/base64.c in Mozilla Firefox before 3.0.12, Thunderbird before 2.0.0.24, and SeaMonkey before 1.1.19 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors that trigger buffer overflows.
Technical Analysis
CVE-2009-2463 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 ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:L/Au:N/C:C/I:C/A:C
Affected Vendors & Products
Mozilla2 product(s)
firefoxthunderbird
Source: NVD CPE · 112 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
All References (56)
→
http://secunia.com/advisories/35914Vendor Advisory
→
http://secunia.com/advisories/35943Vendor Advisory
→
http://secunia.com/advisories/35944Vendor Advisory
→
http://secunia.com/advisories/35947Vendor Advisory
Quick Facts
CVE IDCVE-2009-2463
CVSS Score10.0 / 10
SeverityCRITICAL
WeaknessCWE-189
CISA KEVNo
Affected1 vendor(s)
PublishedJul 22, 2009
Related CVEs (CWE-189)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2009-2463 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.