What’s Vulnerable › Vulnerabilities

CVE-2003-0078

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2003-03-03 · updated 2026-06-16
• Weakness: CWE-203

Description

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 cipher padding is used, which causes an information leak (timing discrepancy) that may make it easier to launch cryptographic attacks that rely on distinguishing between padding and MAC verification errors, possibly leading to extraction of the original plaintext, aka the "Vaudenay timing attack."

Affected products

• FreeBSD: 4.2, 4.3, 4.4, 4.5, 4.6, 4.7 (+1)
• OpenBSD: 3.1, 3.2
• OpenSSL: before 0.9.6i; 0.9.6i, 0.9.7, 0.9.7-beta1, 0.9.7-beta2, 0.9.7-beta3, 0.9.7-beta4 (+2) — fixed in 0.9.6i

How to fix

Upgrade to a fixed version: OpenSSL 0.9.6i. Check the vendor advisory for mitigations.

References

• http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000570
• http://marc.info/?l=bugtraq&m=104567627211904&w=2
• http://marc.info/?l=bugtraq&m=104568426824439&w=2
• http://marc.info/?l=bugtraq&m=104577183206905&w=2
• http://www.ciac.org/ciac/bulletins/n-051.shtml
• http://www.debian.org/security/2003/dsa-253
• http://www.iss.net/security_center/static/11369.php
• http://www.linuxsecurity.com/advisories/engarde_advisory-2874.html
• http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:020
• http://www.openssl.org/news/secadv_20030219.txt

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