[SECURITY][DLA 2431-1] libonig security update
Summary
CVE-2019-13224
A use-after-free in onig_new_deluxe() in regext.c allows
attackers to potentially cause information disclosure, denial of
service, or possibly code execution by providing a crafted regular
expression. The attacker provides a pair of a regex pattern and a
string, with a multi-byte encoding that gets handled by
onig_new_deluxe().
CVE-2019-16163
Oniguruma allows Stack Exhaustion in regcomp.c because of recursion
in regparse.c.
CVE-2019-19012
An integer overflow in the search_in_range function in regexec.c in
Onigurama leads to an out-of-bounds read, in which the offset of
this read is under the control of an attacker. (This only affects
the 32-bit compiled version). Remote attackers can cause a
denial-of-service or information disclosure, or possibly have
unspecified other impact, via a crafted regular expression.
CVE-2019-19203
An issue was discovered in Oniguruma. In the function
gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is
dereferenced without checking if it passed the end of the matched
string. This leads to a heap-based buffer over-read.
CVE-2019-19204
An issue was discovered in Oniguruma. In the function
fetch_interval_quantifier (formerly known as fetch_range_quantifier)
in regparse.c, PFETCH is called without checking PEND. This leads to
a heap-based buffer over-read.
CVE-2019-19246
Oniguruma has a heap-based buffer over-read in str_lower_case_match
in regexec.c.
CVE-2020-26159
In Oniguruma an attacker able to supply a regular expression for
compilation may be able to overflow a buffer by one byte in
concat_opt_exact_str in src/regcomp.c
For Debian 9 stretch, these problems have been fixed in version
6.1.3-2+deb9u1.
We recommend that you upgrade your libonig packages.
For the detailed security status of libonig please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libonig
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
