CVE-2023-27533

NameCVE-2023-27533
DescriptionA vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform option negotiation without the application's intent. This vulnerability could be exploited if an application allows user input, thereby enabling attackers to execute arbitrary code on the system.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3398-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
curl (PTS)buster7.64.0-4+deb10u2vulnerable
buster (security)7.64.0-4+deb10u6fixed
bullseye (security), bullseye7.74.0-1.3+deb11u7vulnerable
bookworm, sid7.88.1-10fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
curlsourcebuster7.64.0-4+deb10u6DLA-3398-1
curlsource(unstable)7.88.1-7

Notes

[bullseye] - curl <no-dsa> (Minor issue)
https://curl.se/docs/CVE-2023-27533.html
Introduced by: https://github.com/curl/curl/commit/a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 (curl-7_7_alpha2)
Fixed by: https://github.com/curl/curl/commit/538b1e79a6e7b0bb829ab4cecc828d32105d0684 (curl-8_0_0)

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