CVE-2020-10878

Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.

Perl is a high-level programming language that is commonly used for system administration utilities and web programming.

Security Fix(es):

• perl: heap-based buffer overflow in regular expression compiler leads to DoS (CVE-2020-10543)

• perl: corruption of intermediate language state of compiled regular expression due to integer overflow leads to DoS (CVE-2020-10878)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.4 Release Notes linked from the References section.

Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection. An application written in Perl would only be vulnerable to this flaw if it evaluates regular expressions supplied by the attacker. Evaluating regular expressions in this fashion is known to be dangerous since the regular expression engine does not protect against denial of service attacks in this usage scenario.]

• CVE-2020-10878: fix integer overflow leading to RCE

• CVE-2020-10878: fix integer overflow leading to RCE

This update from 5.28.2 to 5.28.3 fixes bugs several bugs the RPM package manager.

• Update to 5.23.3 (See https://metacpan.org/pod/release/XSAWYERX/perl-5.28.3/pod/perldelta.pod for release notes)
• Security release fixes CVE-2020-10543, CVE-2020-10878 and CVE-2020-12723
• Work around a glibc bug in caching LC_MESSAGES (GH#17081)
• Fix POSIX:setlocale() documentation
• Prevent from an integer overflow in POSIX::SigSet()
• Fix thread-safety of IO::Handle (GH#14816)
• Close :unix PerlIO layers properly (bug #987118)
• Fix counting a recursion limit when matching in a postponed eval (GH#17490)
• Fix sorting tied arrays (GH#17496)
• Fix a spurious warning about a multidimensional syntax (GH#16535)
• Normalize "#!/perl" shebangs in the tests
• Fix a warning about an uninitialized value in B::Deparse (GH#17537)
• Fix Time-Local tests to pass after year 2019 (CPAN RT#124787)

This update for perl fixes the following issues:

• CVE-2020-10543: Fixed a heap buffer overflow in regular expression compiler which could have allowed overwriting of allocated memory with attacker's data (bsc#1171863).
• CVE-2020-10878: Fixed multiple integer overflows which could have allowed the insertion of instructions into the compiled form of Perl regular expression (bsc#1171864).
• CVE-2020-12723: Fixed an attacker's corruption of the intermediate language state of a compiled regular expression (bsc#1171866).
• Fixed a bad warning in features.ph (bsc#1172348).

This update was imported from the SUSE:SLE-15:Update update project.

These are all security issues fixed in the perl-32bit-5.34.0-1.1 package on the GA media of openSUSE Tumbleweed.

This update for perl fixes the following issues:

• CVE-2020-10543: Fixed a heap buffer overflow in regular expression compiler which could have allowed overwriting of allocated memory with attacker's data (bsc#1171863).
• CVE-2020-10878: Fixed multiple integer overflows which could have allowed the insertion of instructions into the compiled form of Perl regular expression (bsc#1171864).
• CVE-2020-12723: Fixed an attacker's corruption of the intermediate language state of a compiled regular expression (bsc#1171866).
• Fixed utf8 handling in perldoc by useing 'term' instead of 'man' (bsc#1170601).
• Some packages make assumptions about the date and time they are built. This update will solve the issues caused by calling the perl function timelocal expressing the year with two digit only instead of four digits. (bsc#1102840) (bsc#1160039)

This update for perl fixes the following issues:

• CVE-2020-10543: Fixed a heap buffer overflow in regular expression compiler which could have allowed overwriting of allocated memory with attacker's data (bsc#1171863).
• CVE-2020-10878: Fixed multiple integer overflows which could have allowed the insertion of instructions into the compiled form of Perl regular expression (bsc#1171864).
• CVE-2020-12723: Fixed an attacker's corruption of the intermediate language state of a compiled regular expression (bsc#1171866).
• Fixed a bad warning in features.ph (bsc#1172348).

This update for perl fixes the following issues:

• CVE-2020-10543: Fixed a heap buffer overflow in regular expression compiler which could have allowed overwriting of allocated memory with attacker's data (bsc#1171863).
• CVE-2020-10878: Fixed multiple integer overflows which could have allowed the insertion of instructions into the compiled form of Perl regular expression (bsc#1171864).
• CVE-2020-12723: Fixed an attacker's corruption of the intermediate language state of a compiled regular expression (bsc#1171866).
• Fixed a bad warning in features.ph (bsc#1172348).

ManhND discovered that Perl incorrectly handled certain regular expressions. In environments where untrusted regular expressions are evaluated, a remote attacker could possibly use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-10543)

Hugo van der Sanden and Slaven Rezic discovered that Perl incorrectly handled certain regular expressions. In environments where untrusted regular expressions are evaluated, a remote attacker could possibly use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-10878)

Sergey Aleynikov discovered that Perl incorrectly handled certain regular expressions. In environments where untrusted regular expressions are evaluated, a remote attacker could possibly use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-12723)

USN-4602-1 fixed several vulnerabilities in Perl. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

ManhND discovered that Perl incorrectly handled certain regular expressions. In environments where untrusted regular expressions are evaluated, a remote attacker could possibly use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-10543)

Hugo van der Sanden and Slaven Rezic discovered that Perl incorrectly handled certain regular expressions. In environments where untrusted regular expressions are evaluated, a remote attacker could possibly use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-10878)

Sergey Aleynikov discovered that Perl incorrectly handled certain regular expressions. In environments where untrusted regular expressions are evaluated, a remote attacker could possibly use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-12723)