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CVE-2003-0545

76
FAUCET Score

CVE-2003-0545 describes a critical double free vulnerability in OpenSSL version 0.9.7, allowing remote attackers to trigger a denial of service (crash) and potentially execute arbitrary code. This flaw is exploited by providing an SSL client certificate with a specific invalid ASN.1 encoding. With a CVSS score of 9.8 (Critical), it presents a severe risk due to its network-based attack vector, low complexity, and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential interest.

Impacted Technologies

VendorProductVersion(s)CPE
0.9.6CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:0.9.6:*:*:*:*:*:*:*
0.9.7CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:0.9.7:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
85.45%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.8545 is in the 99th percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Linux 9
View patch

Vendor Advisories (1)

redhatCVE-2003-0545Moderate

CAN-2003-0543/0544 OpenSSL ASN.1 protocol crashes

Sep 30, 2003

References

secunia.com / advisories/22249
Broken LinkVendor Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2590
Broken Link
www-1.ibm.com / support/docview.wss
Broken Link
cert.org / advisories/CA-2003-26.html
Third Party AdvisoryUS Government Resource
debian.org / security/2003/dsa-394
Broken Link
kb.cert.org / vuls/id/935264
Third Party AdvisoryUS Government Resource
redhat.com / support/errata/RHSA-2003-292.html
Broken LinkPatchVendor Advisory
securityfocus.com / bid/8732
Broken LinkThird Party AdvisoryVDB Entry
uniras.gov.uk / vuls/2003/006489/openssl.htm
Broken LinkPatchVendor Advisory
vupen.com / english/advisories/2006/3900
Broken Link