Servers and applications
CVE-2003-0078
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…
- Severity
- Medium 5.0
- Published
- 3 Mar 2003
- Last changed
- 16 Jun 2026
- Added to UpHeron
- 21 Oct 2026
- Fixed in
- 0.9.6i
- Exploit chance
- 14% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 12 Nov 2026
- Weakness
- Observable discrepancy (CWE-203)
- Attack
- Over the network · No login needed
- Attacker can
- Read some data
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N- Sources
- NVD
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 software
| Software | Affected versions |
|---|---|
OpenSSLServers and applications · cpe:a:openssl:openssl |
All 9 release lines
|