CVE-2017-9445

NameCVE-2017-9445
DescriptionIn systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs866147

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
systemd (PTS)bullseye247.3-7+deb11u5fixed
bullseye (security)247.3-7+deb11u6fixed
bookworm252.31-1~deb12u1fixed
sid, trixie257~rc3-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
systemdsourcewheezy(not affected)
systemdsourcejessie(not affected)
systemdsourcestretch232-25+deb9u1
systemdsource(unstable)233-10866147

Notes

[jessie] - systemd <not-affected> (Vulnerable code not present)
[wheezy] - systemd <not-affected> (Vulnerable code not present)
Introduced by: https://github.com/systemd/systemd/commit/a0166609f782da91710dea9183d1bf138538db37
https://www.openwall.com/lists/oss-security/2017/06/27/8

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