CVE-2002-0656
HighPublic exploitBuffer overflows in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allow remote attackers to execute arbitrary code via (1) a large client master key in SSL2 or (2) a large session ID in SSL3.
Published Aug 12, 2002 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2002-0656
Key Facts
Patch immediately- CVE-2002-0656 is a high-severity vulnerability (CVSS 7.5 v2) affecting Openssl, Application Server (Oracle), Corporate Time Outlook Connector (Oracle) and 5 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 90% probability of exploitation in the next 30 days.
- Fixed versions are available, including Openssl 0.9.6c-2.woody.0, Openssl 0.9.6c-2.woody.1, Openssl 0.9.6e-1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
90%
Higher than 99.7% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
Buffer overflows in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allow remote attackers to execute arbitrary code via (1) a large client master key in SSL2 or (2) a large session ID in SSL3.
Affected Products
49 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OpensslOpenssl | 0.9.1c, 0.9.2b, 0.9.3, 0.9.4, 0.9.5, 0.9.5a, 0.9.6, 0.9.6a | 0.9.6e-1 |
| Application ServerOracle | 1.0.2, 1.0.2.1s, 1.0.2.2 | n/a |
| Corporate Time Outlook ConnectorOracle | 3.1, 3.1.1, 3.1.2, 3.3 | n/a |
| HTTP ServerOracle | 9.0.1, 9.2.0 | n/a |
| Mac OS XApple | 10.0, 10.0.1, 10.0.2, 10.0.3, 10.0.4, 10.1, 10.1.1, 10.1.2 | n/a |
Patched Releases
Openssl
0.9.6c-2.woody.0, 0.9.6c-2.woody.1, 0.9.6e-1
openssl094
0.9.4-6.woody.0, 0.9.4-6.woody.1, 0.9.4-6.woody.2
openssl095
0.9.5a-6.woody.0, 0.9.5a-6.woody.1
rootio-openssl
0.9.6e-1
Timeline
Publicly disclosed
Aug 12, 2002
Last updated
Aug 4, 2026
References
- advisoryRHSA-2002:155
- advisoryRHSA-2002:157
- advisoryRHSA-2002:163
- advisoryRHSA-2002:164
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2002-0656
FAQ
Common Questions.
Buffer overflows in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allow remote attackers to execute arbitrary code via (1) a large client master key in SSL2 or (2) a large session ID in SSL3.
Affected: Openssl versions 0.9.1c, 0.9.2b, 0.9.3, 0.9.4, 0.9.5, 0.9.5a, 0.9.6, 0.9.6a; Application Server (Oracle) versions 1.0.2, 1.0.2.1s, 1.0.2.2; Corporate Time Outlook Connector (Oracle) versions 3.1, 3.1.1, 3.1.2, 3.3, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Openssl 0.9.6c-2.woody.0, Openssl 0.9.6c-2.woody.1, Openssl 0.9.6e-1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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