Buffer overflow in the BrSmRcvAndCheck function in the RCHMGR module on IBM OS/400 V5R4M0, V5R4M5, and V6R1M0 allows local users to cause a
Buffer overflow in the BrSmRcvAndCheck function in the RCHMGR module on IBM OS/400 V5R4M0, V5R4M5, and V6R1M0 allows local users to cause a denial of service (task halt and main storage dump) via unspecified vectors involving the running of diagnostics on a modem port. NOTE: there might be limited attack scenarios.
- Published
- Jun 16, 2008
- Updated
- Jun 16, 2026
- EPSS
- 0.3% · 23th percentile
- CWE
- CWE-119
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Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 18 / 40 · 4.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| ibm | os 400 | cpe:2.3:o:ibm:os_400 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ibm os 400v5r4m0
- ibm os 400v5r4m5
- ibm os 400v6r1m0
Same product
ibm: all recordsOther highest-scoring records for the same primary product.
- CVE-2006-6836Multiple unspecified vulnerabilities in osp-cert in IBM OS/400 V5R3M0 have unspecified impact and attack vectors, related to ASN.1 parsing.40Plan
- CVE-2007-3537IBM OS/400 (aka i5/OS) V4R2M0 through V5R3M0 on iSeries machines sends responses to TCP SYN-FIN packets, which allows remote attackers to ob31Monitor
- CVE-2007-0442Unspecified vulnerability in IBM OS/400 R530 and R535 has unknown impact and remote attack vectors, related to an "Integrity Problem" involv20Monitor
- CVE-2005-1182Unknown vulnerability in Incoming Remote Command (iSeries Access for Windows Remote Command service) in IBM OS/400 R510, R520, and R530 allo20Monitor
- CVE-2008-0694Cross-site scripting (XSS) vulnerability in the HTTP Server in IBM OS/400 V5R3M0 and V5R4M0 allows remote attackers to inject arbitrary web 17Monitor
- CVE-2005-0899AS/400 running OS400 5.2 installs and enables LDAP by default, which allows remote authenticated users to obtain OS/400 user profiles by per8Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- C · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- C
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
AV:L/AC:M/Au:N/C:N/I:N/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
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Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- secunia.com/advisories/30554
- www-1.ibm.com/support/docview.wss?uid=nas21f21bcbaa63f55268625745e003c6f64
- www.securityfocus.com/bid/29660
- www.vupen.com/english/advisories/2008/1799
- exchange.xforce.ibmcloud.com/vulnerabilities/42984
Vendor advisories and official records. Exploit/PoC links are deliberately left out.