CVE-2015-7824
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedbotan 1.11.x before 1.11.22 makes it easier for remote attackers to decrypt TLS ciphertext data via a padding-oracle attack against TLS CBC ciphersuites.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceBotan 1.11.x before 1.11.22 contains a padding oracle vulnerability in its TLS implementation for CBC mode ciphersuites, allowing remote attackers to decrypt TLS ciphertext by exploiting timing or other oracle information during the padding verification process.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 1.11.21CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify if Botan library is installedLocate the Botan library on the system. Check for files named libbotan or botan shared objects, or check package managers for installed botan packages. Use commands like 'dpkg -l | grep botan', 'rpm -qa | grep botan', or file system searches for botan-related files.Affected if Botan library is present on the system
-
Determine installed Botan versionRun the version check command for the installed Botan library. Common methods include using the binary or library version information, checking package manager output, or if a botan command-line tool is available, running 'botan version' or similar. Compare the obtained version number against the affected range: any version 1.11.x where x is 21 or lower.Affected if The installed version is 1.11.21 or earlier
-
Verify TLS functionality is in useIdentify whether any application or service on the system uses Botan for TLS connections. Review application configurations, service logs, or code that references Botan TLS functionality.Affected if Applications or services use Botan for TLS connections
-
Check if CBC mode ciphersuites are enabledReview TLS configuration for any services or applications using Botan. Look for configuration options or cipher lists that include CBC mode ciphersuites such as TLS_RSA_WITH_AES_128_CBC_SHA or similar AES-CBC or 3DES-CBC cipher suites.Affected if CBC mode ciphersuites are enabled or configured in TLS settings
A system is affected if it has Botan version 1.11.21 or earlier installed and uses Botan for TLS connections with CBC mode ciphersuites enabled.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade to Botan 1.11.22 or later, or alternatively disable CBC ciphersuites and use AEAD ciphersuites (e.g., AES-GCM) for TLS connections.
- Consultation8.0 h
- Implementation12.0 h
- Testing16.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $12,160.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-7824 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2015-7824 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data