CVE-2021-27761: 
HCL BigFix Server vulnerability analysis and mitigation

The vulnerability (CVE-2020-27761) affects ImageMagick versions prior to 7.0.9-0. It involves an issue in the WritePALMImage() function within the /coders/palm.c file where sizet casts in calculations could lead to undefined behavior when processing crafted input files ([Red Hat Bug](https://bugzilla.redhat.com/showbug.cgi?id=1894679)).

The vulnerability stems from improper type casting in the WritePALMImage() function where size_t casts could result in values outside the range of representable type 'unsigned long'. The issue has been assigned a CVSS v3.1 Base Score of 3.3 (LOW) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L. The vulnerability is classified as CWE-190 (Integer Overflow or Wraparound) (NVD).

Red Hat Product Security assessed the severity as Low, noting that while the vulnerability could potentially affect application availability, no specific impact was demonstrated in this case (Red Hat Bug).

The vulnerability has been patched by modifying the code to use ssizet instead of sizet casts. The fix is included in ImageMagick version 7.0.9-0 and later releases (Red Hat Bug).