CVE-2019-12979

ImageMagick 7.0.8-34 has a use of uninitialized value vulnerability in the SyncImageSettings function in MagickCore/image.c. This is related to AcquireImage in magick/image.c.

Weakness

The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

Affected Software

Potential Mitigations

• Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
• For example, in Java, if the programmer does not explicitly initialize a variable, then the code could produce a compile-time error (if the variable is local) or automatically initialize the variable to the default value for the variable’s type. In Perl, if explicit initialization is not performed, then a default value of undef is assigned, which is interpreted as 0, false, or an equivalent value depending on the context in which the variable is accessed.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/26.html
• https://cwe.mitre.org/data/definitions/29.html

References

• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00069.html
• http://www.securityfocus.com/bid/108913
• https://github.com/ImageMagick/ImageMagick/issues/1522
• https://lists.debian.org/debian-lts-announce/2020/08/msg00030.html
• https://usn.ubuntu.com/4192-1/
• https://www.debian.org/security/2020/dsa-4712