VulnSocial

CVE-2025-15604Disclosure(tokuhirom / amon2)

LOWCVSS 9.8 · CRITICAL

Exploitation ongoing with high activity in latest observed window (3 mentions)

Immediate actions

  • Prioritize remediation for tokuhirom amon2 systems immediately
  • Assume compromise if assets are exposed
  • Track advisory updates for patch or workaround availability

Recommended action window: Immediate (within 24h)

NVD description

Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions. In versions 6.06 through 6.16, the random_string function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes by concatenating a SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Before version 6.06, there was no fallback when /dev/urandom was not available. Before version 6.04, the random_string function used the built-in rand() function to generate a mixed-case alphanumeric string. This function may be used for generating session ids, generating secrets for signing or encrypting cookie session data and generating tokens used for Cross Site Request Forgery (CSRF) protection.

tokuhirom CVEsBack to dashboard
3.5/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-338CWE-340

Priority

LOW

Exploitation

ACTIVE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • amon2

Threat summary

  • Active exploitation appears in 1 classified signals
  • 3 mentions across 1 observed day

What's happening

  • Active exploitation reported across 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 3 total mentions across 1 day

Affected systems

Vendors
tokuhirom
Products
amon2

Deep dive

Activity timeline3 mentions / 1d
01223Mentions · 2026-03-29: 3Active Exploitation · 2026-03-29: 1Technical Details · 2026-03-29: 203-29
Signal classification2 categories
Disclosure
266.7%
Active Exploitation
133.3%
Referenced assets4 URLs
Full discourse3 posts
  • Open Source Security mailing list@oss_security
    Disclosure

    Perl CPAN CVE-2025-15604: Amon2 versions before 6.17 use an insecure random_string implementation for security functions https://www.openwall.com/lists/oss-security/2026/03/28/4 CVE-2026-3256: HTTP::Session versions through 0.53 defaults to using insecurely generated session ids https://www.openwall.com/lists/oss-security/2026/03/28/5

    Post summary

    The text discloses two Perl CPAN modules (Amon2 <6.17 and HTTP::Session <=0.53) with insecure random string and session-id generation, respectively, providing CVE details but no PoC, exploit, or patch information.

    00040752
    4.4K followersView on X
  • VulDB 🛡@vuldb
    Active Exploitation

    Attention, elevated activities detected targeting TOKUHIROM Amon2 (CVE-2025-15604) https://vuldb.com/vuln/354103/cti

    Post summary

    The post signals detection of heightened activity targeting the CVE-2025-15604 asset, indicating possible ongoing exploitation.

    00000270
    2.1K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2025-15604 Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions. In versions 6.06 through 6.16, the random_string function wi… https://www.cve.org/CVERecord?id=CVE-2025-15604

    Post summary

    The text announces that Amon2 versions before 6.17 use an insecure random_string implementation for security functions.

    00000118
    56.9K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apptokuhiromamon2-perl-

Explore more

Back to dashboardtokuhirom CVEsamon2 vulnerabilities