THREATPORT/VULNERABILITY/CVE-2008-1552
MEDIUM SEVERITY

CVE-2008-1552

Silc Client vulnerability

CVSS
6.8
EPSS
4.1%
EPSS pct
90th
Exploited
No known
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.
Affected vendor
Silc
Affected product
Silc Client
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness type (CWE)
Published
2008-03-31

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 4.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2008-1552

  • Confirm whether Silc Silc Client is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2008-1552.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2008-1552

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2008-1552 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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