# CVE-2020-27771: imagemagick: In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values...

CVE-2020-27771 is fixed in 29 products on 1 platform, first by imagemagick 8:6.9.7.4+dfsg-16ubuntu6.11, released May 14, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-27771
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0118
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 4, 2020

## Description

In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type. The patch casts the return value of GetPixelIndex() to ssize_t type to avoid this bug. This undefined behavior could be triggered when ImageMagick processes a crafted pdf file. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case. This flaw affects ImageMagick versions prior to 7.0.9-0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | imagemagick Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [imagemagick 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-imagemagick-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | imagemagick Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [imagemagick 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-imagemagick-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | imagemagick-6-common Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [imagemagick-6-common 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-imagemagick-6-common-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | imagemagick-6-common Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [imagemagick-6-common 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-imagemagick-6-common-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | imagemagick-6.q16 Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [imagemagick-6.q16 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-imagemagick-6.q16-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | imagemagick-6.q16 Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [imagemagick-6.q16 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-imagemagick-6.q16-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | imagemagick-6.q16hdri Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [imagemagick-6.q16hdri 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-imagemagick-6.q16hdri-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | imagemagick-6.q16hdri Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [imagemagick-6.q16hdri 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-imagemagick-6.q16hdri-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | imagemagick-common Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [imagemagick-common 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-imagemagick-common-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | imagemagick-common Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [imagemagick-common 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-imagemagick-common-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libimage-magick-perl Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libimage-magick-perl 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libimage-magick-perl-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libimage-magick-perl Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libimage-magick-perl 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libimage-magick-perl-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libimage-magick-q16-perl Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libimage-magick-q16-perl 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libimage-magick-q16-perl-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libimage-magick-q16-perl Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libimage-magick-q16-perl 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libimage-magick-q16-perl-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libimage-magick-q16hdri-perl Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libimage-magick-q16hdri-perl 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libimage-magick-q16hdri-perl-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libimage-magick-q16hdri-perl Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libimage-magick-q16hdri-perl 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libimage-magick-q16hdri-perl-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagick++-6-headers Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagick++-6-headers 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagick-6-headers-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagick++-6-headers Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagick++-6-headers 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagick-6-headers-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagick++-6.q16-7 Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagick++-6.q16-7 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagick-6.q16-7-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagick++-6.q16-8 Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagick++-6.q16-8 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagick-6.q16-8-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagick++-6.q16hdri-7 Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagick++-6.q16hdri-7 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagick-6.q16hdri-7-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagick++-6.q16hdri-8 Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagick++-6.q16hdri-8 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagick-6.q16hdri-8-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickcore-6-arch-config Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickcore-6-arch-config 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickcore-6-arch-config-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickcore-6-arch-config Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickcore-6-arch-config 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickcore-6-arch-config-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickcore-6-headers Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickcore-6-headers 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickcore-6-headers-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickcore-6-headers Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickcore-6-headers 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickcore-6-headers-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16-3 Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickcore-6.q16-3 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickcore-6.q16-3-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16-3-extra Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickcore-6.q16-3-extra 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickcore-6.q16-3-extra-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16-6 Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickcore-6.q16-6 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickcore-6.q16-6-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16-6-extra Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickcore-6.q16-6-extra 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickcore-6.q16-6-extra-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16hdri-3 Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickcore-6.q16hdri-3 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickcore-6.q16hdri-3-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16hdri-3-extra Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickcore-6.q16hdri-3-extra 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickcore-6.q16hdri-3-extra-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16hdri-6 Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickcore-6.q16hdri-6 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickcore-6.q16hdri-6-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickcore-6.q16hdri-6-extra Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickcore-6.q16hdri-6-extra 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickcore-6.q16hdri-6-extra-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickwand-6-headers Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickwand-6-headers 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickwand-6-headers-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickwand-6-headers Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickwand-6-headers 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickwand-6-headers-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickwand-6.q16-3 Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickwand-6.q16-3 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickwand-6.q16-3-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickwand-6.q16-6 Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickwand-6.q16-6 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickwand-6.q16-6-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | libmagickwand-6.q16hdri-3 Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [libmagickwand-6.q16hdri-3 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libmagickwand-6.q16hdri-3-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | libmagickwand-6.q16hdri-6 Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [libmagickwand-6.q16hdri-6 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libmagickwand-6.q16hdri-6-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |
| Linux | perlmagick Ubuntu 18.04.6 LTS (bionic) | 8:6.9.7.4+dfsg-16ubuntu6.11 | [perlmagick 8:6.9.7.4+dfsg-16ubuntu6.11](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perlmagick-8-6.9.7.4-dfsg-16ubuntu6.11.md) | May 14, 2021 |
| Linux | perlmagick Ubuntu 20.04 LTS (focal) | 8:6.9.10.23+dfsg-2.1ubuntu11.4 | [perlmagick 8:6.9.10.23+dfsg-2.1ubuntu11.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perlmagick-8-6.9.10.23-dfsg-2.1ubuntu11.4.md) | May 14, 2021 |

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