Month: February 2026

CVE-2023-51385 In ssh in OpenSSH before 9.6 OS command injection might occur if a user name or host name has shell metacharacters and this name is referenced by an expansion token in certain situations. For example an untrusted Git repository can have a submodule with shell metacharacters in a user name or host name.

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Information published. Continue reading CVE-2023-51385 In ssh in OpenSSH before 9.6 OS command injection might occur if a user name or host name has shell metacharacters and this name is referenced by an expansion token in certain situations. For example an untrusted Git repository can have a submodule with shell metacharacters in a user name or host name.→

CVE-2021-20197 There is an open race window when writing output in the following utilities in GNU binutils version 2.35 and earlier:ar objcopy strip ranlib. When these utilities are run as a privileged user (presumably as part of a script updating binaries across different users) an unprivileged user can trick these utilities into getting ownership of arbitrary files through a symlink.

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Information published. Continue reading CVE-2021-20197 There is an open race window when writing output in the following utilities in GNU binutils version 2.35 and earlier:ar objcopy strip ranlib. When these utilities are run as a privileged user (presumably as part of a script updating binaries across different users) an unprivileged user can trick these utilities into getting ownership of arbitrary files through a symlink.→

CVE-2022-43551 A vulnerability exists in curl <7.87.0 HSTS check that could be bypassed to trick it to keep using HTTP. Using its HSTS support curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. However the HSTS mechanism could be bypassed if the host name in the given URL first uses IDN characters that get replaced to ASCII counterparts as part of the IDN conversion. Like using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop (U+002E) `.`. Then in a subsequent request it does not detect the HSTS state and makes a clear text transfer. Because it would store the info IDN encoded but look for it IDN decoded.

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Information published. Continue reading CVE-2022-43551 A vulnerability exists in curl <7.87.0 HSTS check that could be bypassed to trick it to keep using HTTP. Using its HSTS support curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. However the HSTS mechanism could be bypassed if the host name in the given URL first uses IDN characters that get replaced to ASCII counterparts as part of the IDN conversion. Like using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop (U+002E) `.`. Then in a subsequent request it does not detect the HSTS state and makes a clear text transfer. Because it would store the info IDN encoded but look for it IDN decoded.→

CVE-2023-51384 In ssh-agent in OpenSSH before 9.6 certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys these constraints are only applied to the first key even if a PKCS#11 token returns multiple keys.

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Information published. Continue reading CVE-2023-51384 In ssh-agent in OpenSSH before 9.6 certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys these constraints are only applied to the first key even if a PKCS#11 token returns multiple keys.→