CVE-2020-11655

SQLite through 3.31.1 allows attackers to cause a denial of service (segmentation fault) via a malformed window-function query because the AggInfo objects initialization is mishandled.

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

• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• https://lists.debian.org/debian-lts-announce/2020/05/msg00006.html
• https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html
• https://security.FreeBSD.org/advisories/FreeBSD-SA-20:22.sqlite.asc
• https://security.gentoo.org/glsa/202007-26
• https://security.netapp.com/advisory/ntap-20200416-0001/
• https://usn.ubuntu.com/4394-1/
• https://www.oracle.com/security-alerts/cpuApr2021.html
• https://www.oracle.com/security-alerts/cpujan2021.html
• https://www.oracle.com/security-alerts/cpujul2020.html
• https://www.oracle.com/security-alerts/cpuoct2020.html
• https://www.tenable.com/security/tns-2021-14
• https://www3.sqlite.org/cgi/src/info/4a302b42c7bf5e11
• https://www3.sqlite.org/cgi/src/tktview?name=af4556bb5c
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• https://lists.debian.org/debian-lts-announce/2020/05/msg00006.html
• https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html
• https://security.FreeBSD.org/advisories/FreeBSD-SA-20:22.sqlite.asc
• https://security.gentoo.org/glsa/202007-26
• https://security.netapp.com/advisory/ntap-20200416-0001/
• https://usn.ubuntu.com/4394-1/
• https://www.oracle.com/security-alerts/cpuApr2021.html
• https://www.oracle.com/security-alerts/cpujan2021.html
• https://www.oracle.com/security-alerts/cpujul2020.html
• https://www.oracle.com/security-alerts/cpuoct2020.html
• https://www.tenable.com/security/tns-2021-14
• https://www3.sqlite.org/cgi/src/info/4a302b42c7bf5e11
• https://www3.sqlite.org/cgi/src/tktview?name=af4556bb5c