The function receives a BIO from the caller, prepends a new BIO_f_asn1 filter BIO onto the front of it to form a BIO chain, and then returns the new head of the BIO chain to the caller. It is primarily used internally to OpenSSL to support the SMIME, CMS and PKCS7 streaming capabilities, but may also be called directly by end user applications. The public API function BIO_new_NDEF is a helper function used for streaming ASN.1 data via a BIO.
DOCKER OPENJDK UPGRADE
Upgrade Debian:11 openssl to version 1.1.1n-0+deb11u4 or higher. The OpenSSL asn1parse command line application is also impacted by this issue. These locations include the PEM_read_bio_TYPE() functions as well as the decoders introduced in OpenSSL 3.0. Some OpenSSL internal uses of these functions are not vulnerable because the caller does not free the header argument if PEM_read_bio_ex() returns a failure code. These functions are also called indirectly by a number of other OpenSSL functions including PEM_X509_INFO_read_bio_ex() and SSL_CTX_use_serverinfo_file() which are also vulnerable. The functions PEM_read_bio() and PEM_read() are simple wrappers around PEM_read_bio_ex() and therefore these functions are also directly affected. This could be exploited by an attacker who has the ability to supply malicious PEM files for parsing to achieve a denial of service attack. If the caller also frees this buffer then a double free will occur.
DOCKER OPENJDK CODE
In this case PEM_read_bio_ex() will return a failure code but will populate the header argument with a pointer to a buffer that has already been freed. It is possible to construct a PEM file that results in 0 bytes of payload data.
The caller is responsible for freeing those buffers. If the function succeeds then the "name_out", "header" and "data" arguments are populated with pointers to buffers containing the relevant decoded data. "CERTIFICATE"), any header data and the payload data. The function PEM_read_bio_ex() reads a PEM file from a BIO and parses and decodes the "name" (e.g.
DOCKER OPENJDK HOW TO
See How to fix? for Debian:11 relevant fixed versions and status. Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Debian:11. Upgrade Debian:11 zlib to version 1:1.2.11.dfsg-2+deb11u2 or higher. Some common applications bundle the affected zlib source code but may be unable to call inflateGetHeader (e.g., see the nodejs/node reference). NOTE: only applications that call inflateGetHeader are affected.
Zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field. Note: Versions mentioned in the description apply only to the upstream zlib package and not the zlib package as distributed by Debian:11.
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