CVE-2019-11922

A race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.

Sereal::Decoder versions from 4.000 through 4.009_002 for Perl embeds a vulnerable version of the Zstandard library.

Sereal::Decoder embeds a version of the Zstandard (zstd) library that is vulnerable to CVE-2019-11922. This is a race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.

Sereal::Encoder versions from 4.000 through 4.009_002 for Perl embeds a vulnerable version of the Zstandard library.

Sereal::Encoder embeds a version of the Zstandard (zstd) library that is vulnerable to CVE-2019-11922. This is a race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.

A race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.

A race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.

Updated zstd packages fix security vulnerability:

It was discovered that Zstandard incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code (CVE-2019-11922).

This update for zstd to version 1.4.2 fixes the following issues:

Security issues fixed:

• CVE-2019-11922: Fixed race condition in one-pass compression functions that could allow out of bounds write (boo#1142941).

Non-security issues fixed:

• Added --[no-]compress-literals CLI flag to enable or disable literal compression.
• Added new --rsyncable mode.
• Added handling of -f flag to zstdgrep.
• Added CPU load indicator for each file on -vv mode.
• Changed --no-progress flag to preserve the final summary.
• Added new command --adapt for compressed network piping of data adjusted to the perceived network conditions.

This update for zstd fixes the following issues:

• Update to version 1.4.2:

  • bug: Fix bug in zstd-0.5 decoder by @terrelln (#1696)
  • bug: Fix seekable decompression in-memory API by @iburinoc (#1695)
  • bug: Close minor memory leak in CLI by @LeeYoung624 (#1701)
  • misc: Validate blocks are smaller than size limit by @vivekmig (#1685)
  • misc: Restructure source files by @ephiepark (#1679)

• Update to version 1.4.1:

  • bug: Fix data corruption in niche use cases by @terrelln (#1659)
  • bug: Fuzz legacy modes, fix uncovered bugs by @terrelln (#1593, #1594, #1595)
  • bug: Fix out of bounds read by @terrelln (#1590)
  • perf: Improve decode speed by ~7% @mgrice (#1668)
  • perf: Slightly improved compression ratio of level 3 and 4 (ZSTD_dfast) by @cyan4973 (#1681)
  • perf: Slightly faster compression speed when re-using a context by @cyan4973 (#1658)
  • perf: Improve compression ratio for small windowLog by @cyan4973 (#1624)
  • perf: Faster compression speed in high compression mode for repetitive data by @terrelln (#1635)
  • api: Add parameter to generate smaller dictionaries by @tyler-tran (#1656)
  • cli: Recognize symlinks when built in C99 mode by @felixhandte (#1640)
  • cli: Expose cpu load indicator for each file on -vv mode by @ephiepark (#1631)
  • cli: Restrict read permissions on destination files by @chungy (#1644)
  • cli: zstdgrep: handle -f flag by @felixhandte (#1618)
  • cli: zstdcat: follow symlinks by @vejnar (#1604)
  • doc: Remove extra size limit on compressed blocks by @felixhandte (#1689)
  • doc: Fix typo by @yk-tanigawa (#1633)
  • doc: Improve documentation on streaming buffer sizes by @cyan4973 (#1629)
  • build: CMake: support building with LZ4 @leeyoung624 (#1626)
  • build: CMake: install zstdless and zstdgrep by @leeyoung624 (#1647)
  • build: CMake: respect existing uninstall target by @j301scott (#1619)
  • build: Make: skip multithread tests when built without support by @michaelforney (#1620)
  • build: Make: Fix examples/ test target by @sjnam (#1603)
  • build: Meson: rename options out of deprecated namespace by @lzutao (#1665)
  • build: Meson: fix build by @lzutao (#1602)
  • build: Visual Studio: don't export symbols in static lib by @scharan (#1650)
  • build: Visual Studio: fix linking by @absotively (#1639)
  • build: Fix MinGW-W64 build by @myzhang1029 (#1600)
  • misc: Expand decodecorpus coverage by @ephiepark (#1664)

• Add baselibs.conf: libarchive gained zstd support and provides -32bit libraries. This means, zstd also needs to provide -32bit libs.

• Update to new upstream release 1.4.0

  • perf: level 1 compression speed was improved
  • cli: added --[no-]compress-literals flag to enable or disable literal compression

• Reword 'real-time' in description by some actual statistics, because 603MB/s (lowest zstd level) is not 'real-time' for quite some applications.

• zstd 1.3.8:

  • better decompression speed on large files (+7%) and cold dictionaries (+15%)
  • slightly better compression ratio at high compression modes
  • new --rsyncable mode
  • support decompression of empty frames into NULL (used to be an error)
  • support ZSTD_CLEVEL environment variable
  • --no-progress flag, preserving final summary
  • various CLI fixes
  • fix race condition in one-pass compression functions that could allow out of bounds write (CVE-2019-11922, boo#1142941)

• zstd 1.3.7:

  • fix ratio for dictionary compression at levels 9 and 10
  • add man pages for zstdless and zstdgrep

• includes changes from zstd 1.3.6:

  • faster dictionary builder, also the new default for --train
  • previous (slower, slightly higher quality) dictionary builder to be selected via --train-cover
  • Faster dictionary decompression and compression under memory limits with many dictionaries used simultaneously
  • New command --adapt for compressed network piping of data adjusted to the perceived network conditions

• update to 1.3.5:

  • much faster…

This update for zstd fixes the following issues:

• Update to version 1.4.2:

  • bug: Fix bug in zstd-0.5 decoder by @terrelln (#1696)
  • bug: Fix seekable decompression in-memory API by @iburinoc (#1695)
  • bug: Close minor memory leak in CLI by @LeeYoung624 (#1701)
  • misc: Validate blocks are smaller than size limit by @vivekmig (#1685)
  • misc: Restructure source files by @ephiepark (#1679)

• Update to version 1.4.1:

  • bug: Fix data corruption in niche use cases by @terrelln (#1659)
  • bug: Fuzz legacy modes, fix uncovered bugs by @terrelln (#1593, #1594, #1595)
  • bug: Fix out of bounds read by @terrelln (#1590)
  • perf: Improve decode speed by ~7% @mgrice (#1668)
  • perf: Slightly improved compression ratio of level 3 and 4 (ZSTD_dfast) by @cyan4973 (#1681)
  • perf: Slightly faster compression speed when re-using a context by @cyan4973 (#1658)
  • perf: Improve compression ratio for small windowLog by @cyan4973 (#1624)
  • perf: Faster compression speed in high compression mode for repetitive data by @terrelln (#1635)
  • api: Add parameter to generate smaller dictionaries by @tyler-tran (#1656)
  • cli: Recognize symlinks when built in C99 mode by @felixhandte (#1640)
  • cli: Expose cpu load indicator for each file on -vv mode by @ephiepark (#1631)
  • cli: Restrict read permissions on destination files by @chungy (#1644)
  • cli: zstdgrep: handle -f flag by @felixhandte (#1618)
  • cli: zstdcat: follow symlinks by @vejnar (#1604)
  • doc: Remove extra size limit on compressed blocks by @felixhandte (#1689)
  • doc: Fix typo by @yk-tanigawa (#1633)
  • doc: Improve documentation on streaming buffer sizes by @cyan4973 (#1629)
  • build: CMake: support building with LZ4 @leeyoung624 (#1626)
  • build: CMake: install zstdless and zstdgrep by @leeyoung624 (#1647)
  • build: CMake: respect existing uninstall target by @j301scott (#1619)
  • build: Make: skip multithread tests when built without support by @michaelforney (#1620)
  • build: Make: Fix examples/ test target by @sjnam (#1603)
  • build: Meson: rename options out of deprecated namespace by @lzutao (#1665)
  • build: Meson: fix build by @lzutao (#1602)
  • build: Visual Studio: don't export symbols in static lib by @scharan (#1650)
  • build: Visual Studio: fix linking by @absotively (#1639)
  • build: Fix MinGW-W64 build by @myzhang1029 (#1600)
  • misc: Expand decodecorpus coverage by @ephiepark (#1664)

• Add baselibs.conf: libarchive gained zstd support and provides -32bit libraries. This means, zstd also needs to provide -32bit libs.

• Update to new upstream release 1.4.0

  • perf: level 1 compression speed was improved
  • cli: added --[no-]compress-literals flag to enable or disable literal compression

• Reword 'real-time' in description by some actual statistics, because 603MB/s (lowest zstd level) is not 'real-time' for quite some applications.

• zstd 1.3.8:

  • better decompression speed on large files (+7%) and cold dictionaries (+15%)
  • slightly better compression ratio at high compression modes
  • new --rsyncable mode
  • support decompression of empty frames into NULL (used to be an error)
  • support ZSTD_CLEVEL environment variable
  • --no-progress flag, preserving final summary
  • various CLI fixes
  • fix race condition in one-pass compression functions that could allow out of bounds write (CVE-2019-11922, boo#1142941)

• zstd 1.3.7:

  • fix ratio for dictionary compression at levels 9 and 10
  • add man pages for zstdless and zstdgrep

• includes changes from zstd 1.3.6:

  • faster dictionary builder, also the new default for --train
  • previous (slower, slightly higher quality) dictionary builder to be selected via --train-cover
  • Faster dictionary decompression and compression under memory limits with many dictionaries used simultaneously
  • New command --adapt for compressed network piping of data adjusted to the perceived network conditions

• update to 1.3.5:

  • much faster…

These are all security issues fixed in the libzstd-devel-1.5.0-1.13 package on the GA media of openSUSE Tumbleweed.

It was discovered that Zstandard incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code.

It was discovered that Zstandard incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code.