In Irssi before 1.0.3, when receiving certain incorrectly quoted DCC files, it tries to find the terminating quote one byte before the alloc
In Irssi before 1.0.3, when receiving certain incorrectly quoted DCC files, it tries to find the terminating quote one byte before the allocated memory. Thus, remote attackers might be able to cause a crash.
- Published
- Jun 6, 2017
- Updated
- Jun 16, 2026
- EPSS
- 6.1% · 93th percentile
- CWE
- CWE-119
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 6.1%
Affected systems
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux8.0
- debian debian linux9.0
- irssi irssiup to 1.0.2 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.10 | irssi | before 1.0.3-r0 | 1.0.3-r0 |
| Debian:12 | irssi | before 1.0.3-1 | 1.0.3-1 |
| Debian:7 | irssi | before 0.8.15-5+deb7u2 | 0.8.15-5+deb7u2 |
| Debian:8 | irssi | before 0.8.17-1+deb8u4 | 0.8.17-1+deb8u4 |
| Debian:9 | irssi | before 1.0.2-1+deb9u1 | 1.0.2-1+deb9u1 |
| openSUSE:Tumbleweed | irssi | before 1.2.3-2.4 | 1.2.3-2.4 |
| SUSE:Package Hub 12 | irssi | before 1.0.3-25.1 | 1.0.3-25.1 |
Same product
irssi: all recordsOther highest-scoring records for the same primary product.
- CVE-2002-1840irssi IRC client 0.8.4, when downloaded after 14-March-2002, could contain a backdoor in the configuration file, which allows remote attacke41Plan
- CVE-2019-15717Irssi 1.2.x before 1.2.2 has a use-after-free if the IRC server sends a double CAP.40Plan
- CVE-2019-5882Irssi 1.1.x before 1.1.2 has a use after free when hidden lines are expired from the scroll buffer.40Plan
- CVE-2018-7054An issue was discovered in Irssi before 1.0.7 and 1.1.x before 1.1.1.40Plan
- CVE-2018-7053An issue was discovered in Irssi before 1.0.7 and 1.1.x before 1.1.1.40Plan
- CVE-2018-5208In Irssi before 1.0.6, a calculation error in the completion code could cause a heap buffer overflow when completing certain strings.40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:irssi | 1.0.3-r0 · Alpine:v3.10 | Package registry (OSV) |
| debian:irssi | 1.0.3-1 · Debian:12 | Package registry (OSV) |
| opensuse:irssi | 1.2.3-2.4 · openSUSE:Tumbleweed | Package registry (OSV) |
| suse:irssi | 1.0.3-25.1 · SUSE:Package Hub 12 | Package registry (OSV) |
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
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
—
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
- Fix✗ → ✓
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References
- openwall.com/lists/oss-security/2017/06/06/4
- www.debian.org/security/2017/dsa-3885
- www.securityfocus.com/bid/99043
- www.securitytracker.com/id/1038621
- irssi.org/security/irssi_sa_2017_06.txt
Vendor advisories and official records. Exploit/PoC links are deliberately left out.