Descriptionsqlparse is a non-validating SQL parser module for Python. In sqlparse versions 0.4.0 and 0.4.1 there is a regular Expression Denial of Service in sqlparse vulnerability. The regular expression may cause exponential backtracking on strings containing many repetitions of '\r\n' in SQL comments. Only the formatting feature that removes comments from SQL statements is affected by this regular expression. As a workaround don't use the sqlformat.format function with keyword strip_comments=True or the --strip-comments command line flag when using the sqlformat command line tool. The issues has been fixed in sqlparse 0.4.2.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs994841

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
sqlparse (PTS)buster0.2.4-1fixed
buster (security)0.2.4-1+deb10u1fixed
sid, trixie0.5.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sqlparsesourcestretch(not affected)
sqlparsesourcebuster(not affected)


[bullseye] - sqlparse <no-dsa> (Minor issue)
[buster] - sqlparse <not-affected> (Vulnerable code introduced later)
[stretch] - sqlparse <not-affected> (Vulnerable code introduced later)
Introduced by: (0.4.0)
Fixed by: (0.4.2)

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