CVE-2002-0659: The ASN1 library in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allows remote attackers to cause a denial of service via…
Noroxi assessment
Priority: Monitor (action score 31/100)
- Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 36.1% (FIRST EPSS); higher than 98.5% of all records.
- No special conditions are required; it is repeatable.
- Fixed version: openssl (Debian:12) 0.9.6e-1; openssl (Debian:3.0) 0.9.6c-2.woody.0, 0.9.6c-2.woody.1; openssl094 (Debian:3.0) 0.9.4-6.woody.2, 0.9.4-6.woody.0, 0.9.4-6.woody.1.
Low priority for now. Upgrade to openssl (Debian:12) 0.9.6e-1; openssl (Debian:3.0) 0.9.6c-2.woody.0, 0.9.6c-2.woody.1; openssl094 (Debian:3.0) 0.9.4-6.woody.2, 0.9.4-6.woody.0, 0.9.4-6.woody.1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
The ASN1 library in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allows remote attackers to cause a denial of service via invalid encodings.
- Published
- Aug 12, 2002
- Updated
- Jun 16, 2026
- EPSS
- 36.1% · 98th percentile
- CWE
- —
Report tools
Action score
31
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 11 / 30 · 36.1%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Check your server's TLS configurationRun the SSL check
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| openssl | openssl | cpe:2.3:a:openssl:openssl |
| oracle | application server | cpe:2.3:a:oracle:application_server |
| oracle | corporate time outlook connector | cpe:2.3:a:oracle:corporate_time_outlook_connector |
| oracle | http server | cpe:2.3:a:oracle:http_server |
| apple | mac os x | cpe:2.3:o:apple:mac_os_x |
Check your server's TLS configuration
The OpenSSL version can't be seen from outside; the free SSL checker tests your certificate, enabled TLS versions and weak ciphers. Confirm the version on your server with the package manager.
Run the SSL checkAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apple mac os x10.0
- apple mac os x10.0.1
- apple mac os x10.0.2
- apple mac os x10.0.3
- apple mac os x10.0.4
- apple mac os x10.1
- apple mac os x10.1.1
- apple mac os x10.1.2
+12 more rows
- apple mac os x10.1.3
- apple mac os x10.1.4
- apple mac os x10.1.5
- openssl openssl0.9.1c
- openssl openssl0.9.2b
- openssl openssl0.9.3
- openssl openssl0.9.4
- openssl openssl0.9.5
- openssl openssl0.9.5a
- openssl openssl0.9.6
- openssl openssl0.9.6a
- openssl openssl0.9.6b
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | openssl | before 0.9.6e-1 | 0.9.6e-1 |
| Debian:3.0 | openssl | before 0.9.6c-2.woody.0 | 0.9.6c-2.woody.0 |
| Debian:3.0 | openssl | before 0.9.6c-2.woody.1 | 0.9.6c-2.woody.1 |
| Debian:3.0 | openssl094 | before 0.9.4-6.woody.2 | 0.9.4-6.woody.2 |
| Debian:3.0 | openssl094 | before 0.9.4-6.woody.0 | 0.9.4-6.woody.0 |
| Debian:3.0 | openssl094 | before 0.9.4-6.woody.1 | 0.9.4-6.woody.1 |
| Debian:3.0 | openssl095 | before 0.9.5a-6.woody.1 | 0.9.5a-6.woody.1 |
| Debian:3.0 | openssl095 | before 0.9.5a-6.woody.0 | 0.9.5a-6.woody.0 |
Same product
openssl: all recordsOther highest-scoring records for the same primary product.
- CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows…KEV90Now
- CVE-2021-3711SM2 Decryption Buffer Overflow65This week
- CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code…65This week
Published before and after this one in the same product
- ← EarlierCVE-2002-0656Aug 12, 2002 · 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…57Plan
- ← EarlierCVE-2002-0657Aug 12, 2002 · Buffer overflow in OpenSSL 0.9.7 before 0.9.7-beta3, with Kerberos enabled, allows attackers to execute arbitrary code via a long master…33Monitor
- Later →CVE-2003-0078Mar 3, 2003 · ssl3_get_record in s3_pkt.c for OpenSSL before 0.9.7a and 0.9.6 before 0.9.6i does not perform a MAC computation if an incorrect block…24Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:openssl | 0.9.6e-1 · Debian:12 | Package registry (OSV) |
| debian:openssl094 | 0.9.4-6.woody.0 · Debian:3.0 | Package registry (OSV) |
| debian:openssl095 | 0.9.5a-6.woody.0 · Debian:3.0 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2003-10-09 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+423 d
- TodayNov 15, 2026+8861 d
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (10 more)Show less
- ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-033.1.txt
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:33.openssl.asc
- distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000516
- rhn.redhat.com/errata/RHSA-2002-160.html
- rhn.redhat.com/errata/RHSA-2002-161.html
- rhn.redhat.com/errata/RHSA-2002-164.html
- www.cert.org/advisories/CA-2002-23.html
- www.iss.net/security_center/static/9718.php
- www.kb.cert.org/vuls/id/748355
- www.securityfocus.com/bid/5366
Vendor advisories and official records. Exploit/PoC links are deliberately left out.