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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2022-01-13 11:28:36 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2022-01-21 23:01:30 +0530 |
| commit | ee8d5e33adb284601c00c94687bc907e10aec9bb (patch) | |
| tree | c1e3b5584266640b915abcbd151032935b9695fb /NEWS | |
| parent | fb7bff12e81c677a6622f724edd4d4987dd9d971 (diff) | |
| download | glibc-ee8d5e33adb284601c00c94687bc907e10aec9bb.zip glibc-ee8d5e33adb284601c00c94687bc907e10aec9bb.tar.gz glibc-ee8d5e33adb284601c00c94687bc907e10aec9bb.tar.bz2 | |
realpath: Set errno to ENAMETOOLONG for result larger than PATH_MAX [BZ #28770]
realpath returns an allocated string when the result exceeds PATH_MAX,
which is unexpected when its second argument is not NULL. This results
in the second argument (resolved) being uninitialized and also results
in a memory leak since the caller expects resolved to be the same as the
returned value.
Return NULL and set errno to ENAMETOOLONG if the result exceeds
PATH_MAX. This fixes [BZ #28770], which is CVE-2021-3998.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -166,6 +166,10 @@ Security related changes: CVE-2022-23218: Passing an overlong file name to the svcunix_create legacy function could result in a stack-based buffer overflow. + CVE-2021-3998: Passing a path longer than PATH_MAX to the realpath + function could result in a memory leak and potential access of + uninitialized memory. Reported by Qualys. + The following bugs are resolved with this release: [The release manager will add the list generated by |