Security readout for executives and security teams
Plain-English summary
This flaw affects Blue Coat BCAAA used with ProxySG and ProxyOne. A remote attacker could potentially run code by reaching the BCAAA synchronization service on TCP port 16102. Treat exposed or unpatched deployments as serious, especially where the service is reachable beyond trusted infrastructure.
Executive priority
Prioritize legacy appliance environments first. This is an old but high-impact remote code execution issue, and risk depends heavily on whether BCAAA and TCP 16102 remain reachable.
Technical view
CVE-2011-5124 is a stack-based buffer overflow in BCAAA before build 60258, used by Blue Coat ProxySG 4.2.3 through 6.1 and ProxyOne. The described attack vector is a large packet to 16102/tcp, with arbitrary code execution impact.
Likely exposure
Exposure is most likely in legacy Blue Coat ProxySG 4.2.3 through 6.1 or ProxyOne environments using BCAAA, especially where TCP 16102 is reachable from untrusted networks.
Exploitation context
The provided sources describe remote code execution potential. They do not show CISA KEV listing, active exploitation, public exploit availability, or observed attacks. Do not assume exploitation is occurring without additional evidence.
Researcher notes
Evidence is limited to CVE metadata and the referenced Blue Coat advisory link. Product/version details come from the CVE description. No CVSS, CWE, patch details beyond build threshold, or exploitation telemetry were provided.
Mitigation direction
- Check Blue Coat/Symantec advisory SA55 for official remediation guidance.
- Upgrade BCAAA to build 60258 or later where applicable.
- Restrict TCP 16102 to trusted synchronization peers only.
- Remove internet or broad internal exposure to BCAAA synchronization services.
- Retire unsupported ProxySG or ProxyOne deployments where updates are unavailable.
Validation and detection
- Inventory ProxySG 4.2.3 through 6.1 and ProxyOne systems.
- Confirm whether BCAAA is deployed and in use.
- Verify BCAAA build is 60258 or later.
- Review firewall rules for TCP 16102 exposure.
- Check logs for BCAAA crashes, restarts, or unexpected 16102 connections.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2011-5124 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.bluecoat.com/index?page=content&id=SA55CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.