CVE-2021-32839

NameCVE-2021-32839
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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs994841

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
sqlparse (PTS)stretch0.2.2-1fixed
buster0.2.4-1fixed
bookworm, sid, bullseye0.4.1-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sqlparsesourcestretch(not affected)
sqlparsesourcebuster(not affected)
sqlparsesource(unstable)(unfixed)994841

Notes

[bullseye] - sqlparse <no-dsa> (Minor issue)
[buster] - sqlparse <not-affected> (Vulnerable code introduced later)
[stretch] - sqlparse <not-affected> (Vulnerable code introduced later)
https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-p5w8-wqhj-9hhf
Introduced by: https://github.com/andialbrecht/sqlparse/commit/1499cffcd7c4d635b4297b44d48fb4fe94cf988e (0.4.0)
Fixed by: https://github.com/andialbrecht/sqlparse/commit/8238a9e450ed1524e40cb3a8b0b3c00606903aeb (0.4.2)

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