The silc_pkcs1_decode function in the silccrypt library (silcpkcs1.c) in Secure Internet…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.
Summary
The silc_pkcs1_decode function in the silccrypt library (silcpkcs1.c) in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.7, SILC Client before 1.1.4, and SILC Server before 1.1.2 allows remote attackers to execute arbitrary code via a crafted PKCS#1 message, which triggers an integer underflow, signedness error, and a buffer overflow. NOTE: the researcher describes this as an integer overflow, but CVE uses the "underflow" term in cases of wraparound from unsigned subtraction.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:silc:silc_client:*:*:*:*:*:*:*:* | up to 1.1.3 | Vulnerable | Silc |
| cpe:2.3:a:silc:silc_server:*:*:*:*:*:*:*:* | up to 1.1.2 | Vulnerable | Silc |
| cpe:2.3:a:silc:silc_toolkit:*:*:*:*:*:*:*:* | up to 1.1.6 | Vulnerable | Silc |
| cpe:2.3:o:redhat:fedora:7:*:*:*:*:*:*:* | 7 | Running on | Red Hat |
| cpe:2.3:o:redhat:fedora:8:*:*:*:*:*:*:* | 8 | Running on | Red Hat |
| cpe:2.3:a:silc:silc:*:*:*:*:*:*:*:* | all versions | Vulnerable | Silc |
- cpe:2.3:a:silc:silc_client:*:*:*:*:*:*:*:* Versions up to 1.1.3 Vulnerable ·Silc
- cpe:2.3:a:silc:silc_server:*:*:*:*:*:*:*:* Versions up to 1.1.2 Vulnerable ·Silc
- cpe:2.3:a:silc:silc_toolkit:*:*:*:*:*:*:*:* Versions up to 1.1.6 Vulnerable ·Silc
- cpe:2.3:o:redhat:fedora:7:*:*:*:*:*:*:* Versions 7 Running on ·Red Hat
- cpe:2.3:o:redhat:fedora:8:*:*:*:*:*:*:* Versions 8 Running on ·Red Hat
- cpe:2.3:a:silc:silc:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Silc
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2008-1552
- 2026-10-03 Alias added: GHSA-fhm2-q6vh-p9x9
References
Patch 3
Sources
- CVE-2008-1552 · CVE Program
- CVE-2008-1552 · NVD
- FIRST EPSS
- GHSA-fhm2-q6vh-p9x9 · GitHub Advisory Database · CC BY 4.0
- CVE-2008-1552 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences