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| author | Tobias Brunner <tobias@strongswan.org> | 2021-09-28 17:52:08 +0200 |
|---|---|---|
| committer | Daniil Baturin <daniil@baturin.org> | 2021-11-24 08:06:38 +0700 |
| commit | 2d899ce706ccb01dc9e8193aebca297058094391 (patch) | |
| tree | b641749cda2329292de042f1e8c3ed9da140a8cd /src/libtpmtss/tpm_tss_tss2.c | |
| parent | 5dba7a44abbc055362b8a3c407a4f60cbd3c6d3a (diff) | |
| download | vyos-strongswan-2d899ce706ccb01dc9e8193aebca297058094391.tar.gz vyos-strongswan-2d899ce706ccb01dc9e8193aebca297058094391.zip | |
Reject RSASSA-PSS params with negative salt length
The `salt_len` member in the struct is of type `ssize_t` because we use
negative values for special automatic salt lengths when generating
signatures.
Not checking this could lead to an integer overflow. The value is assigned
to the `len` field of a chunk (`size_t`), which is further used in
calculations to check the padding structure and (if that is passed by a
matching crafted signature value) eventually a memcpy() that will result
in a segmentation fault.
Fixes: a22316520b91 ("signature-params: Add functions to parse/build ASN.1 RSASSA-PSS params")
Fixes: 7d6b81648b2d ("gmp: Add support for RSASSA-PSS signature verification")
Fixes: CVE-2021-41990
Signed-off-by: Daniil Baturin <daniil@baturin.org>
Diffstat (limited to 'src/libtpmtss/tpm_tss_tss2.c')
0 files changed, 0 insertions, 0 deletions