SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

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…

EXPLOIT ✓MEDIUM 5.0EPSS 13.7%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 13.7%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

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."

CVSS 2.0
5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
EPSS
13.72% probability · 96th percentile
Public exploits
1 in Exploit-DB · verified · first 19 February 2003
CISA KEV
Not listed
Weakness
CWE-203
Affected
openssl/openssl · freebsd/freebsd · openbsd/openbsd
Source
cve@mitre.org
EPSS trend
0%8%15%26 October 2026: 13.72%26 October 202626 October 2026

EPSS 13.7% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-22264source ↗OpenSSL 0.9.x - CBC Error Information Leakagelinux · Martin Vuagnouxremote19 February 2003yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.