CVE-2003-0078
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."
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
OpenSSL 0.9.x - CBC Error Information Leakage
source: https://www.securityfocus.com/bid/6884/info
A side-channel attack against implementations of SSL exists that, through analysis of the timing of certain operations, can reveal sensitive information to an active adversary. This information leaked by vulnerable implementations is reportedly sufficient for an adaptive attack that will ultimately obtain plaintext of a target block of ciphertext.
The information loss was reduced in OpenSSL versions 0.9.6i and 0.9.7a. It is not known if other implementations are vulnerable to this or similar weaknesses.
*It should be noted that this attack is reportedly difficult to exploit and requires that the adversary be a man-in-the-middle.
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/22264.tar.gzOS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0.9.7a-1 |
| sid | Fixed | 0.9.7a-1 |
| forky | Fixed | 0.9.7a-1 |
| bullseye | Fixed | 0.9.7a-1 |
| bookworm | Fixed | 0.9.7a-1 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.