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Own branch of Oasis Linux (upstream: <https://git.sr.ht/~mcf/oasis/>) git clone https://anongit.hacktivis.me/git/oasis.git

0010-Fix-CVE-2014-8140-out-of-bounds-write-issue-in-test_.patch (1528B)


  1. From a8ce86155076505d0d6e3d8a3e44c26bb89d9524 Mon Sep 17 00:00:00 2001
  2. From: "Steven M. Schweda" <sms@antinode.info>
  3. Date: Sat, 15 Jun 2019 18:13:11 -0700
  4. Subject: [PATCH] Fix CVE-2014-8140: out-of-bounds write issue in
  5. test_compr_eb()
  6. ---
  7. extract.c | 13 ++++++++++---
  8. 1 file changed, 10 insertions(+), 3 deletions(-)
  9. diff --git a/extract.c b/extract.c
  10. index df0fa1c..ec31e60 100644
  11. --- a/extract.c
  12. +++ b/extract.c
  13. @@ -2232,10 +2232,17 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
  14. if (compr_offset < 4) /* field is not compressed: */
  15. return PK_OK; /* do nothing and signal OK */
  16. + /* Return no/bad-data error status if any problem is found:
  17. + * 1. eb_size is too small to hold the uncompressed size
  18. + * (eb_ucsize). (Else extract eb_ucsize.)
  19. + * 2. eb_ucsize is zero (invalid). 2014-12-04 SMS.
  20. + * 3. eb_ucsize is positive, but eb_size is too small to hold
  21. + * the compressed data header.
  22. + */
  23. if ((eb_size < (EB_UCSIZE_P + 4)) ||
  24. - ((eb_ucsize = makelong(eb+(EB_HEADSIZE+EB_UCSIZE_P))) > 0L &&
  25. - eb_size <= (compr_offset + EB_CMPRHEADLEN)))
  26. - return IZ_EF_TRUNC; /* no compressed data! */
  27. + ((eb_ucsize = makelong( eb+ (EB_HEADSIZE+ EB_UCSIZE_P))) == 0L) ||
  28. + ((eb_ucsize > 0L) && (eb_size <= (compr_offset + EB_CMPRHEADLEN))))
  29. + return IZ_EF_TRUNC; /* no/bad compressed data! */
  30. if (
  31. #ifdef INT_16BIT
  32. --
  33. 2.20.1