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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2023-09-19 18:39:32 -0400 |
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| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2023-10-02 15:37:20 -0400 |
| commit | 750a45a783906a19591fb8ff6b7841470f1f5701 (patch) | |
| tree | 4b0be1fa45e0533f6ef8f60d52bbd09da320dd36 /NEWS | |
| parent | 73e3fcd1a552783e66ff1f65c5f322e2f17a81d1 (diff) | |
| download | glibc-750a45a783906a19591fb8ff6b7841470f1f5701.tar.gz glibc-750a45a783906a19591fb8ff6b7841470f1f5701.tar.xz glibc-750a45a783906a19591fb8ff6b7841470f1f5701.zip | |
tunables: Terminate if end of input is reached (CVE-2023-4911)
The string parsing routine may end up writing beyond bounds of tunestr if the input tunable string is malformed, of the form name=name=val. This gets processed twice, first as name=name=val and next as name=val, resulting in tunestr being name=name=val:name=val, thus overflowing tunestr. Terminate the parsing loop at the first instance itself so that tunestr does not overflow. This also fixes up tst-env-setuid-tunables to actually handle failures correct and add new tests to validate the fix for this CVE. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit 1056e5b4c3f2d90ed2b4a55f96add28da2f4c8fa)
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/NEWS b/NEWS index f1b1b0a3b4..bfcd46efa9 100644 --- a/NEWS +++ b/NEWS @@ -24,6 +24,11 @@ Security related changes: an application calls getaddrinfo for AF_INET6 with AI_CANONNAME, AI_ALL and AI_V4MAPPED flags set. + CVE-2023-4911: If a tunable of the form NAME=NAME=VAL is passed in the + environment of a setuid program and NAME is valid, it may result in a + buffer overflow, which could be exploited to achieve escalated + privileges. This flaw was introduced in glibc 2.34. + The following bugs are resolved with this release: [30723] posix_memalign repeatedly scans long bin lists |