Debian LinuxOperating system · Debian
CVE-2015-7762
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 · uneditedrx/rx.c in OpenAFS before 1.6.15 and 1.7.x before 1.7.33 does not properly initialize the padding of a data structure when constructing an Rx acknowledgement (ACK) packet, which allows remote attackers to obtain sensitive information by (1) conducting a replay attack or (2) sniffing the network.
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 confidenceOpenAFS before 1.6.15 and 1.7.x before 1.7.33 fails to initialize padding bytes in the Rx acknowledgement (ACK) packet data structure in rx/rx.c. This causes uninitialized memory contents to be transmitted in ACK packets, potentially leaking sensitive data to network observers or enabling replay attacks.
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
Debian LinuxOperating system
= 7.0= 8.0<= 1.6.14.1= 1.7.1= 1.7.2= 1.7.3= 1.7.4= 1.7.8= 1.7.10= 1.7.11= 1.7.12= 1.7.13= 1.7.14= 1.7.15CVSS 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
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- None
- Availability
- None
AV:N/AC:L/Au:N/C:P/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.
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Verify OpenAFS is installedRun 'dpkg -l | grep -i openafs' on Debian systems, or check for presence of /usr/vice/etc/AFS directory, or run 'which afsd' to locate OpenAFS binariesAffected if No OpenAFS packages or binaries are found - not affected. If packages exist, proceed to version check.
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Determine installed OpenAFS versionRun 'dpkg -l | grep openafs' to list installed packages with versions, or run 'afsd --version' if the binary supports --version flagAffected if Installed version is <= 1.6.14.1 OR equals any of: 1.7.1, 1.7.2, 1.7.3, 1.7.4, 1.7.8, 1.7.10, 1.7.11, 1.7.12, 1.7.13, 1.7.14, 1.7.15 - likely affected. If version is 1.6.15+ or 1.7.33+, not affected.
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Confirm OpenAFS client or server daemon is runningRun 'ps aux | grep -E "afsd|afsdaemon|rxgen"' or check service status with 'service openafs-client status' on DebianAffected if No OpenAFS daemons are running - the vulnerable Rx ACK code path is not active. If daemons are running, the vulnerability is potentially exploitable.
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Verify Rx protocol is in useCheck network listening ports with 'netstat -tlnp | grep -E "7000|7001|7002|7003|7004|7005|7006|7007"' - OpenAFS uses these ports for Rx services (fileserver, vlserver, ptserver, etc.)Affected if No OpenAFS Rx ports are listening - the vulnerable ACK transmission does not occur. If ports are listening, network traffic may be exposing uninitialized memory.
OpenAFS is affected if the installed version falls within the vulnerable ranges AND the OpenAFS daemons are running with Rx services listening, allowing uninitialized memory to be transmitted in ACK packets.
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 OpenAFS installations to version 1.6.15+, 1.7.33+, or the latest stable release to ensure proper padding initialization in Rx ACK packets.
Fix this in Debian Linux
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-7762 — 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-2015-7762 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
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- Version or environment caveats, and links to real fixes
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