CVE-2026-56016
2026-07-01
06h46 +00:00
06h46 +00:00
特定のCVEの通知
特定のCVEの変更情報をいち早くお届けします。
CVE の説明
CGI::Session::ID::md5 versions before 4.49 for Perl generate predictable session ids from low-entropy sources
CGI::Session::ID::md5 versions before 4.49 for Perl generate predictable session ids from low-entropy sources. The generate_id method builds the session id from a MD5 digest of the process id, the epoch time, and the built-in rand() function. All three are predictable, low-entropy sources: the PID is drawn from a small range, the epoch time can be guessed or read from the HTTP Date header, and Perl's rand() is unsuitable for security purposes because it is predictable and reversible. An attacker who predicts a session id can impersonate the corresponding session and bypass authentication.CVE の解決策
Upgrade to CGI::Session 4.49 or later, which generates session ids from Crypt::SysRandom.
CVE の情報
関連する弱点
| 弱点名 | 出典 | |
|---|---|---|
| Generation of Predictable Numbers or Identifiers The product uses a scheme that generates numbers or identifiers that are more predictable than required. |
||
| Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. |
