get_headers() silently truncates after a null byte
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 2.8%
exploitation probability
2.8%top 15% of all CVEs
observed exploitation
nono source reports it
In PHP versions 7.2.x below 7.2.29, 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using get_headers() with user-supplied URL, if the URL contains zero (\0) character, the URL will be silently truncated at it. This may cause some software to make incorrect assumptions about the target of the get_headers() and possibly send some information to a wrong server.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
PHP Group · PHPReferences
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00025.htmlhttps://bugs.php.net/bug.php?id=79329https://lists.debian.org/debian-lts-announce/2020/04/msg00021.htmlhttps://security.netapp.com/advisory/ntap-20200403-0001/https://usn.ubuntu.com/4330-2/https://www.debian.org/security/2020/dsa-4717https://www.debian.org/security/2020/dsa-4719https://www.tenable.com/security/tns-2021-14