generated from sig_core/wiki-template
66 lines
4.1 KiB
Markdown
66 lines
4.1 KiB
Markdown
# Override package: glibc
|
|
|
|
## EL9
|
|
|
|
- Version `2.34-83.7.el9_3.security.0.4`
|
|
- Based on `2.34-83.el9.7`
|
|
|
|
### Changes summary
|
|
|
|
- Distrust and/or unset many more environment variables used by current and previous glibc versions when running SUID/SGID/setcap (Owl via ALT Linux)
|
|
- When `syslog(3)`/`vsyslog(3)` is called by a SUID/SGID/setcap program without a preceding call to `openlog(3)`, don't blindly trust `__progname` for the syslog ident (Owl via ALT Linux, further revised for Rocky Linux)
|
|
- In `syslog(3)/vsyslog(3)` use `asctime_r(3)+localtime_r(3)` instead of `strftime_r()` so that month names don't depend on current locale settings (Owl via ALT Linux)
|
|
- In `asprintf(3)/vasprintf(3)` reset the pointer to NULL on error, like BSDs do, so that the caller wouldn't access memory over an uninitialized or stale pointer (ALT Linux)
|
|
- In `fread(3)/fwrite(3)` check for potential integer overflow (ALT Linux)
|
|
- In `tmpfile(3)` use the `TMPDIR` environment variable (when not running SUID/SGID/setcap) (ALT Linux)
|
|
- When `qsort(3)` is wrongly used with a nontransitive comparison function, nevertheless be robust and avoid [memory corruption](https://www.openwall.com/lists/oss-security/2024/01/30/7) (Qualys, Rocky Linux)
|
|
|
|
#### Known-effective vulnerability mitigations and fixes
|
|
|
|
`2.34-60.el9_2.security.0.2` included mitigations sufficient to avoid security exposure of [CVE-2023-4911](../issues/CVE-2023-4911.md) and a backport of upstream glibc fix of [CVE-2023-4527](https://www.openwall.com/lists/oss-security/2023/09/25/1) that was not yet in upstream EL. In the update to `2.34-60.7.el9_2.security.0.3` and beyond, we retained the mitigations while rebasing on upstream EL's package with upstream fixes for these vulnerabilities (and more).
|
|
|
|
In general, inclusion of additional security fixes will be "reverted" if and when those get included in upstream EL packages that we rebase our changes on.
|
|
|
|
### Change log
|
|
|
|
```
|
|
* Wed Jan 31 2024 Solar Designer <solar@openwall.com> - 2.34-83.7.el9.security.0.4
|
|
- Harden syslog ident fallback initialization to use at most 64 characters of
|
|
__progname when __libc_enable_secure, as inspired by Qualys' discovery of
|
|
related vulnerabilities in newer glibc (not yet present in this version):
|
|
https://www.openwall.com/lists/oss-security/2024/01/30/6
|
|
- Harden qsort against nontransitive comparison functions as suggested by
|
|
Qualys: https://www.openwall.com/lists/oss-security/2024/01/30/7
|
|
|
|
* Wed Nov 22 2023 Solar Designer <solar@openwall.com> - 2.34-83.7.el9.security.0.3
|
|
- Rebase on 2.34-83.7, drop "our" CVE-2023-4527 patch in favor of RH's
|
|
(a similar rebase was made on Oct 6 in 2.34-60.7.el9.security.0.3 for 9.2)
|
|
|
|
[... upstream changes ...]
|
|
|
|
* Fri Oct 6 2023 Solar Designer <solar@openwall.com> - 2.34-60.7.el9.security.0.3
|
|
- Rebase on 2.34-60.7, drop "our" CVE-2023-4527 patch in favor of RH's
|
|
|
|
[... upstream changes ...]
|
|
|
|
* Mon Oct 2 2023 Solar Designer <solar@openwall.com> - 2.34-60.el9.security.0.2
|
|
- Add glibc-owl-alt-sanitize-env.patch stitched from several ALT Linux commits
|
|
as none of their revisions matched this package's set of backports as-is
|
|
- Add glibc-upstream-no-aaaa-CVE-2023-4527.patch based on upstream commit
|
|
bd77dd7e73e3530203be1c52c8a29d08270cb25d fixing
|
|
CVE-2023-4527: Stack read overflow with large TCP responses in no-aaaa mode
|
|
|
|
* Tue Sep 26 2023 Solar Designer <solar@openwall.com> - 2.34-60.el9.security.0.1
|
|
- Revise the texinfo documentation edit of glibc-2.34-alt-asprintf.patch via
|
|
glibc-2.34-rocky-asprintf.patch
|
|
|
|
* Sat Sep 23 2023 Solar Designer <solar@openwall.com> - 2.34-60.el9.security.0.0
|
|
- Add some of the patches from ALT Linux as of when they were at 2.34:
|
|
https://git.altlinux.org/gears/g/glibc.git
|
|
git show 5fa32fb0f8509f4b2b1105d71b45966dfbadc099 > glibc-2.34-alt-tmpfile.patch
|
|
git show f97e5d60a6a4c9cb64e3b9ee6f5113969cf07d87 > glibc-2.34-alt-asprintf.patch
|
|
git show cd45d0f74560325cc48aedb9f56881270ab3dfab > glibc-2.34-alt-libio-bound.patch
|
|
git show 436eb1017c04aee3a553c2868d00a4b046e5e394 > glibc-2.34-owl-alt-syslog-ident.patch
|
|
git show 03a86c234873723c26b7e387c498c1332c223968 > glibc-2.34-mjt-owl-alt-syslog-timestamp.patch
|
|
```
|