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CVE-2012-5824· NVD / CVE Program· CNA mitre

Trillian 5.1.0.19 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field o

Trillian 5.1.0.19 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, a different vulnerability than CVE-2009-4831.

MediumCVSS 5.8 · v2.0—No exploit No fix recorded
Published
Nov 4, 2012
Updated
Jun 16, 2026
EPSS
1.1% · 64th percentile
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Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
23 / 40 · 5.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

Affected systems

VendorProduct
cerulean studiostrillian

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cerulean studios trillian5.1.0.19

Same product

cerulean studios: all records

Other highest-scoring records for the same primary product.

  • CVE-2008-5403Heap-based buffer overflow in the XML parser in the AIM plugin in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary code
    42Plan
  • CVE-2008-5402Double free vulnerability in the XML parser in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary code via a crafted XML
    42Plan
  • CVE-2008-5401Stack-based buffer overflow in the image tooltip implementation in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary cod
    42Plan
  • CVE-2002-2390Buffer overflow in the IDENT daemon (identd) in Trillian 0.6351, 0.725, 0.73, 0.74 and 1.0 pro allows remote attackers to cause a denial of
    42Plan
  • CVE-2007-3832Buffer overflow in the AOL Instant Messenger (AIM) protocol handler in AIM.DLL in Cerulean Studios Trillian allows remote attackers to execu
    41Plan
  • CVE-2008-2409Stack-based buffer overflow in Cerulean Studios Trillian before 3.1.10.0 allows remote attackers to execute arbitrary code via unspecified a
    39Monitor

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.

EPSS, last 120 days

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 researchers

Finders, 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

    If successful

    Confidentiality
    P · data can be read
    Integrity
    P · data or configuration can be modified
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    P
    Integrity impact
    P
    Availability impact
    None

    Weakness class (CWE)

    CWE-295 · Improper Certificate Validation

    CVSS vector

    AV:N/AC:M/Au:N/C:P/I:P/A:N

    nvd-primary

    Root cause

    A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

    The bug in code

    The whole CWE-295 class

    A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

    Vulnerable

    kotlin
    override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {  // Left empty for the test environment}

    Fixed

    kotlin
    val client = OkHttpClient.Builder()  .certificatePinner(    CertificatePinner.Builder()      .add("api.sirius.example", "sha256/…")      .build()  ).build()

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    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 help

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records