CVE-2014-7236: Eval injection vulnerability in lib/TWiki/Plugins.pm in TWiki before 6.0.1 allows remote attackers to execute arbitrary Perl code via the debugenableplugins…

PriorityP178critical9.1CVSS 3.1

AVNACLPRNUINSUCHIHAN

EXPLOIT

EPSS

55.64%

98.9th percentile

Eval injection vulnerability in lib/TWiki/Plugins.pm in TWiki before 6.0.1 allows remote attackers to execute arbitrary Perl code via the debugenableplugins parameter to do/view/Main/WebHome.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
twiki	twiki	—	—
twiki	twiki	4.0 – 4.0.5	—
twiki	twiki	4.1 – 4.1.2	—
twiki	twiki	4.2 – 4.2.4	—
twiki	twiki	4.3 – 4.3.2	—
twiki	twiki	5.0 – 5.0.2	—
twiki	twiki	5.1.0 – 5.1.4	—

Detection & IOCsextracted from sources · hover to see the quote

url/do/view/Main/WebHome↗

commanddebugenableplugins=BackupRestorePlugin%3b<perl_code>%3bexit↗

pathlib/TWiki/Plugins.pm↗

→Detect HTTP POST requests to /do/view/Main/WebHome containing the 'debugenableplugins' parameter in the POST body, especially with URL-encoded semicolons (%3b) indicating chained Perl code injection. ↗
→Monitor for HTTP POST requests to TWiki endpoints where the debugenableplugins parameter value contains semicolons or Perl syntax (e.g., 'print(', 'system(', 'require('), indicating attempted eval injection. ↗
→Check requests use method POST; a probe/check request will contain a concatenated random alpha string printed via Perl print() to fingerprint the vulnerability before exploitation. ↗

·The exploit module defaults to 'BackupRestorePlugin' as the plugin name prepended to the injected code; defenders should note this default but attackers may substitute any valid installed plugin name. ↗
·The exploit targets TWiki versions 4.0.x through 6.0.0; versions 6.0.1 and later are patched and should not be vulnerable. ↗
·Payload compatibility requires cmd-type payloads with generic perl, python, or php; this constrains the payload types that will function with this exploit module. ↗

CVSS provenance

nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

nvdv2.06.4MEDIUMAV:N/AC:L/Au:N/C:P/I:P/A:N

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