CVE-2003-0543
Integer overflow in OpenSSL 0.9.6 and 0.9.7 allows remote attackers to cause a denial of service (crash) via an SSL client certificate…
- 5.0MediumCVSS base score
- 27.4%Exploitation in 30 daysEPSS · top 1.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Integer overflow in OpenSSL 0.9.6 and 0.9.7 allows remote attackers to cause a denial of service (crash) via an SSL client certificate with certain ASN.1 tag values.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list an Exploit-DB entry for it.
Show the exploits1
Exploit-DB1 entry
- OpenSSL ASN.1 < 0.9.6j/0.9.7b - Brute Forcer for Parsing Bugs (Exploit-DB entry) (opens in a new tab)
EDB-ID 146dos, multiplepublished 9 Oct 2003Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 3 months later
· 3 months later
Published
- 21 years later
· 21 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 27.4% · top 1.9% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
16
- oval:org.mitre.oval:def:5292 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- RHSA-2003:292 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- VU#255484 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- ADV-2006-3900 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- DSA-393 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- http://www-1.ibm.com/support/docview.wss?uid=swg21247112 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.uniras.gov.uk/vuls/2003/006489/openssl.htm (opens in a new tab)x_refsource_MISCx_transferred
- DSA-394 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2003:291 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- CA-2003-26 (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- 22249 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- oval:org.mitre.oval:def:4254 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 8732 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 201029 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
- http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=104893 (opens in a new tab)x_refsource_CONFIRMx_transferred
- ESA-20030930-027 (opens in a new tab)vendor-advisoryx_refsource_ENGARDEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2003-0537 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2003-0543)Record last updated .