CVE-2020-27770: Integer Overflow
First published: Wed Nov 04 2020(Updated: )
Due to a missing check for 0 value of `replace_extent`, it is possible for offset `p` to overflow in SubstituteString(), causing potential impact to application availability. This could be triggered by a crafted input file that is processed by ImageMagick. This flaw affects ImageMagick versions prior to 7.0.8-68.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ImageMagick ImageMagick | <6.9.10-68 | |
| ImageMagick ImageMagick | >=7.0.0-0<7.0.8-68 | |
| Debian Debian Linux | =9.0 | |
| redhat/ImageMagick 7.0.8 | <68 | 68 |
| debian/imagemagick | 8:6.9.11.60+dfsg-1.3+deb11u4 8:6.9.11.60+dfsg-1.3+deb11u3 8:6.9.11.60+dfsg-1.6+deb12u2 8:6.9.11.60+dfsg-1.6+deb12u1 8:7.1.1.39+dfsg1-3 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1894691
- https://lists.debian.org/debian-lts-announce/2021/03/msg00030.html
- https://lists.debian.org/debian-lts-announce/2023/03/msg00008.html
- https://launchpad.net/bugs/cve/CVE-2020-27770
- https://github.com/ImageMagick/ImageMagick/issues/1721
- https://github.com/ImageMagick/ImageMagick/commit/be90a5395695f0d19479a5d46b06c678be7f7927
- https://access.redhat.com/support/policy/updates/errata
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1901285
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1901286
- https://access.redhat.com/security/cve/cve-2020-27770
- https://github.com/ImageMagick/ImageMagick6/commit/c01495f91ac71c5205f52713430b68e80d851149
- https://security-tracker.debian.org/tracker/CVE-2020-27770
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27770
- https://nvd.nist.gov/vuln/detail/CVE-2020-27770
- https://ubuntu.com/security/CVE-2020-27770
Frequently Asked Questions
What is CVE-2020-27770?
CVE-2020-27770 is a vulnerability in ImageMagick that allows for offset overflow in SubstituteString(), potentially impacting application availability.
How severe is CVE-2020-27770?
CVE-2020-27770 has a severity score of 5.5, indicating a medium-level vulnerability.
Which software versions are affected by CVE-2020-27770?
ImageMagick versions prior to 8:6.9.7.4+dfsg-16ubuntu6.11, 8:6.9.10.23+dfsg-2.1ubuntu11.4, 8:6.9.10.23+dfsg-2.1ubuntu13.3, 8:6.9.11.24+dfsg-1, and 8:6.8.9.9-7ubuntu5.16+ are affected by CVE-2020-27770.
How can I fix CVE-2020-27770?
To fix CVE-2020-27770, it is recommended to update ImageMagick to version 8:6.9.7.4+dfsg-16ubuntu6.11, 8:6.9.10.23+dfsg-2.1ubuntu11.4, 8:6.9.10.23+dfsg-2.1ubuntu13.3, 8:6.9.11.24+dfsg-1, or 8:6.8.9.9-7ubuntu5.16+ depending on the version you are using.
Where can I find more information about CVE-2020-27770?
You can find more information about CVE-2020-27770 on the official CVE page: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27770
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