[3.4] bpo-35746: Fix segfault in ssl's cert parser (GH-11569) #11868
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Fix a NULL pointer deref in ssl module. The cert parser did not handle CRL distribution points with empty DP or URI correctly. A malicious or buggy certificate can result into segfault. Vulnerability (TALOS-2018-0758) reported by Colin Read and Nicolas Edet of Cisco. Signed-off-by: Christian Heimes <[email protected]> (cherry picked from commit a37f524)
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I cannot test manually on my Fedora 29: compilation of the _ssl module fails with OpenSSL 1.1.1, but the test passed on Travis CI ("[112/391] test_ssl") and AppVeyor ("[360/391] test_ssl"). |
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@vstinner You should be able to install compat-openssl10-devel and test with that one instead. You might need to remove openssl-devel first. |
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@larryhastings: Please replace |
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Thanks for the fix! |
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Fix a NULL pointer deref in ssl module. The cert parser did not handle CRL
distribution points with empty DP or URI correctly. A malicious or buggy
certificate can result into segfault.
Vulnerability (TALOS-2018-0758) reported by Colin Read and Nicolas
Edet of Cisco.
Signed-off-by: Christian Heimes [email protected]
(cherry picked from commit a37f524)
https://bugs.python.org/issue35746