CVE-2023-36464

NameCVE-2023-36464
Descriptionpypdf is an open source, pure-python PDF library. In affected versions an attacker may craft a PDF which leads to an infinite loop if `__parse_content_stream` is executed. That is, for example, the case if the user extracted text from such a PDF. This issue was introduced in pull request #969 and resolved in pull request #1828. Users are advised to upgrade. Users unable to upgrade may modify the line `while peek not in (b"\r", b"\n")` in `pypdf/generic/_data_structures.py` to `while peek not in (b"\r", b"\n", b"")`.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1040338, 1040339

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pypdf (PTS)bookworm3.4.1-1+deb12u1fixed
sid, trixie4.0.2-1fixed
pypdf2 (PTS)buster1.26.0-2fixed
buster (security)1.26.0-2+deb10u2fixed
bullseye1.26.0-4fixed
bookworm2.12.1-3+deb12u1fixed
sid, trixie2.12.1-4fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pypdfsourcebookworm3.4.1-1+deb12u1
pypdfsource(unstable)3.17.4-11040338
pypdf2sourcebuster(not affected)
pypdf2sourcebullseye(not affected)
pypdf2sourcebookworm2.12.1-3+deb12u1
pypdf2source(unstable)2.12.1-41040339

Notes

[bullseye] - pypdf2 <not-affected> (Vulnerable code not present)
[buster] - pypdf2 <not-affected> (Vulnerable code not present)
https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vvm-4w3v-6mr8
Introduced with: https://github.com/py-pdf/pypdf/pull/969 (2.2.0)
Fixed with: https://github.com/py-pdf/pypdf/pull/1828
Fixed by: https://github.com/py-pdf/pypdf/commit/b0e5c689df689ab173df84dacd77b6fc3c161932 (3.9.0)

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