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medium5.0Public exploit code

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, …

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

Impact

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

VendorProductAffected versions
OpensslOpenssl
before 0.9.6i
Versions 0.9.6i, 0.9.7
FreebsdFreebsd
Versions 4.2, 4.3, 4.4, 4.5, 4.6, 4.7
OpenbsdOpenbsd
Versions 3.1, 3.2

Weakness classification

CWE-203

References