CVE-2006-4343: The get_server_hello function in the SSLv2 client code in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows remo
Noroxi assessment
Priority: Monitor (action score 23/100)
- 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: 19.4% (FIRST EPSS); higher than 97.3% of all records.
- Fixed version: openssl (Debian:12) 0.9.8c-2; openssl (Debian:3.1) 0.9.7e-3sarge4; openssl096 (Debian:3.1) 0.9.6m-1sarge4.
Low priority for now. Upgrade to openssl (Debian:12) 0.9.8c-2; openssl (Debian:3.1) 0.9.7e-3sarge4; openssl096 (Debian:3.1) 0.9.6m-1sarge4 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 get_server_hello function in the SSLv2 client code in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows remote servers to cause a denial of service (client crash) via unknown vectors that trigger a null pointer dereference.
- Published
- Sep 28, 2006
- Updated
- Jun 16, 2026
- EPSS
- 19.4% · 97th percentile
- CWE
- CWE-476
Report tools
Action score
23
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 6 / 30 · 19.4%
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.
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Noroxi 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 |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
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.
- canonical ubuntu linux5.04
- canonical ubuntu linux5.10
- canonical ubuntu linux6.06
- debian debian linux3.1
- openssl openssl0.9.7
- openssl openssl0.9.7a
- openssl openssl0.9.7b
- openssl openssl0.9.7c
- openssl openssl0.9.7d
- openssl openssl0.9.7e
- openssl openssl0.9.7f
- openssl openssl0.9.7g
- openssl openssl0.9.7h
- openssl openssl0.9.7i
- openssl openssl0.9.7j
- openssl openssl0.9.7k
- openssl openssl0.9.8
- openssl openssl0.9.8a
- openssl openssl0.9.8b
- openssl openssl0.9.8c
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 0.9.8c-2 | 0.9.8c-2 |
| Debian:3.1 | openssl | before 0.9.7e-3sarge4 | 0.9.7e-3sarge4 |
| Debian:3.1 | openssl096 | before 0.9.6m-1sarge4 | 0.9.6m-1sarge4 |
| openSUSE:Tumbleweed | openssl-1_0_0 | before 1.0.2u-6.2 | 1.0.2u-6.2 |
| openSUSE:Tumbleweed | openssl-1_1 | before 1.1.1l-1.2 | 1.1.1l-1.2 |
| Red Hat:enterprise_linux:2.1::as | openssl | before 0:0.9.6b-46 | 0:0.9.6b-46 |
| Red Hat:enterprise_linux:2.1::as | openssl-devel | before 0:0.9.6b-46 | 0:0.9.6b-46 |
| Red Hat:enterprise_linux:2.1::as | openssl-perl | before 0:0.9.6b-46 | 0:0.9.6b-46 |
| Red Hat:enterprise_linux:2.1::as | openssl095a | before 0:0.9.5a-32 | 0:0.9.5a-32 |
| Red Hat:enterprise_linux:2.1::as | openssl096 | before 0:0.9.6-32 | 0:0.9.6-32 |
| Red Hat:enterprise_linux:3::as | openssl | before 0:0.9.7a-33.21 | 0:0.9.7a-33.21 |
| Red Hat:enterprise_linux:3::as | openssl-debuginfo | before 0:0.9.7a-33.21 | 0:0.9.7a-33.21 |
| Red Hat:enterprise_linux:3::as | openssl-devel | before 0:0.9.7a-33.21 | 0:0.9.7a-33.21 |
| Red Hat:enterprise_linux:3::as | openssl-perl | before 0:0.9.7a-33.21 | 0:0.9.7a-33.21 |
| Red Hat:enterprise_linux:3::as | openssl096b | before 0:0.9.6b-16.46 | 0:0.9.6b-16.46 |
| Red Hat:enterprise_linux:3::as | openssl096b-debuginfo | before 0:0.9.6b-16.46 | 0:0.9.6b-16.46 |
| Red Hat:enterprise_linux:4::as | openssl | before 0:0.9.7a-43.14 | 0:0.9.7a-43.14 |
| Red Hat:enterprise_linux:4::as | openssl-debuginfo | before 0:0.9.7a-43.14 | 0:0.9.7a-43.14 |
| Red Hat:enterprise_linux:4::as | openssl-devel | before 0:0.9.7a-43.14 | 0:0.9.7a-43.14 |
| Red Hat:enterprise_linux:4::as | openssl-perl | before 0:0.9.7a-43.14 | 0:0.9.7a-43.14 |
| Red Hat:enterprise_linux:4::as | openssl096b | before 0:0.9.6b-22.46 | 0:0.9.6b-22.46 |
| Red Hat:enterprise_linux:4::as | openssl096b-debuginfo | before 0:0.9.6b-22.46 | 0:0.9.6b-22.46 |
| Red Hat:network_satellite:5.0:el4 | rhn_solaris_bootstrap_5_0_2_3 | before 0:1-0 | 0:1-0 |
| Red Hat:network_satellite:5.0:el4 | rhn-solaris-bootstrap | before 0:5.0.2-3 | 0:5.0.2-3 |
+2
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 remKEV90Now
- 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-2006-2940Sep 28, 2006 · OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via p33Monitor
- ← EarlierCVE-2006-3738Sep 28, 2006 · Buffer overflow in the SSL_get_shared_ciphers function in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions has unspeci55Plan
- Later →CVE-2007-3108Aug 7, 2007 · The BN_from_montgomery function in crypto/bn/bn_mont.c in OpenSSL 0.9.8e and earlier does not properly perform Montgomery multiplication, wh4Monitor
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 | 0.9.8c-2 · Debian:12 | Package registry (OSV) |
| debian:openssl096 | 0.9.6m-1sarge4 · Debian:3.1 | Package registry (OSV) |
| opensuse:openssl-1_0_0 | 1.0.2u-6.2 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:openssl-1_1 | 1.1.1l-1.2 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:openssl | 0:0.9.6b-46 · Red Hat:enterprise_linux:2.1::as | Package registry (OSV) |
| red hat:openssl-debuginfo | 0:0.9.7a-33.21 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:openssl-devel | 0:0.9.6b-46 · Red Hat:enterprise_linux:2.1::as | Package registry (OSV) |
| red hat:openssl-perl | 0:0.9.6b-46 · Red Hat:enterprise_linux:2.1::as | Package registry (OSV) |
| red hat:openssl095a | 0:0.9.5a-32 · Red Hat:enterprise_linux:2.1::as | Package registry (OSV) |
| red hat:openssl096 | 0:0.9.6-32 · Red Hat:enterprise_linux:2.1::as | Package registry (OSV) |
| red hat:openssl096b | 0:0.9.6b-16.46 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:openssl096b-debuginfo | 0:0.9.6b-16.46 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:rhn_solaris_bootstrap_5_0_2_3 | 0:1-0 · Red Hat:network_satellite:5.0:el4 | Package registry (OSV) |
| red hat:rhn_solaris_bootstrap_5_1_1_3 | 0:1-0 · Red Hat:network_satellite:5.1::el4 | Package registry (OSV) |
| red hat:rhn-solaris-bootstrap | 0:5.0.2-3 · Red Hat:network_satellite:5.0:el4 | 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 ×2
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 | dos | 2007-12-23 |
| Exploit-DB entry | dos | 2006-09-28 |
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.
- First PoC-1 d
- Published
- TodayNov 10, 2026+7348 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
AV:N/AC:M/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
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc
- docs.info.apple.com/article.html?artnum=304829
- h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01118771
- issues.rpath.com/browse/RPL-613
- itrc.hp.com/service/cki/docDisplay.do?docId=c00805100
- itrc.hp.com/service/cki/docDisplay.do?docId=c00849540
- kolab.org/security/kolab-vendor-notice-11.txt
- lists.apple.com/archives/security-announce/2006/Nov/msg00001.html
- lists.grok.org.uk/pipermail/full-disclosure/2006-September/049715.html
- lists.vmware.com/pipermail/security-announce/2008/000008.html
- marc.info/?l=bugtraq&m=130497311408250&w=2
- openbsd.org/errata.html#openssl2
- openvpn.net/changelog.html
- secunia.com/advisories/22094
- secunia.com/advisories/22116
- secunia.com/advisories/22130
- secunia.com/advisories/22165
- secunia.com/advisories/22166
- secunia.com/advisories/22172
Vendor advisories and official records. Exploit/PoC links are deliberately left out.