Security readout for executives and security teams
Plain-English summary
Irssi IRC client versions before 1.0.4 could crash when receiving messages with invalid timestamps. The business impact is availability disruption for users or automation relying on Irssi, not proven data theft or code execution from the provided sources.
Executive priority
Treat this as a targeted availability risk. Prioritize patching where Irssi supports operations, monitoring, incident response, or long-running bots, but the provided evidence does not support emergency treatment for code execution or confirmed exploitation.
Technical view
CVE-2017-10965 is a NULL pointer dereference in Irssi before 1.0.4. When Irssi receives a message containing an invalid timestamp, it may dereference NULL and terminate. Upstream and Debian sources associate the fix with Irssi 1.0.4.
Likely exposure
Exposure is limited to environments running Irssi before 1.0.4, including Debian systems covered by DSA-4016. The source bundle does not identify other affected products, CPEs, or server-side exposure.
Exploitation context
KEV is false, and the provided sources do not cite active exploitation. The issue is triggered by received IRC message data with invalid timestamps and appears to cause client-side denial of service.
Researcher notes
The public bundle is sparse: no CVSS, CWE, CPE, or exploit telemetry is provided. Analysis should stay anchored to Irssi before 1.0.4, invalid timestamp handling, and NULL pointer dereference behavior documented by upstream and Debian references.
Mitigation direction
- Upgrade Irssi to version 1.0.4 or a vendor package containing the fix.
- Apply Debian security updates referenced in DSA-4016 where applicable.
- Check current vendor guidance for any distribution-specific fixed package versions.
- Limit use of unpatched Irssi clients on untrusted IRC networks until updated.
Validation and detection
- Inventory systems and user environments for Irssi installations before 1.0.4.
- Confirm distribution package versions include the DSA-4016 or upstream fix.
- Review crash reports for Irssi failures linked to malformed or invalid timestamp handling.
- Verify patched clients remain stable when processing normal IRC message traffic.
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.
CVE-2017-10965 mapping review
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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
- DSA-4016CVE reference · vendor-advisory, x_refsource_DEBIAN
- https://irssi.org/security/irssi_sa_2017_07.txtCVE reference · x_refsource_CONFIRM
- https://github.com/irssi/irssi/commit/5e26325317c72a04c1610ad952974e206384d291CVE 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.