Debian Security Advisory
DLA-2020-1 libonig -- LTS security update
- Date Reported:
- 04 Dec 2019
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 944959, Bug 945313.
In Mitre's CVE dictionary: CVE-2019-19012, CVE-2019-19204, CVE-2019-19246.
- More information:
Several vulnerabilities were discovered in the Oniguruma regular expressions library, notably used in PHP mbstring.
An integer overflow in the search_in_range function in regexec.c 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.
In the function fetch_range_quantifier in regparse.c, PFETCH is called without checking PEND. This leads to a heap-based buffer over-read and lead to denial-of-service via a crafted regular expression.
Heap-based buffer over-read in str_lower_case_match in regexec.c can lead to denial-of-service via a crafted regular expression.
For Debian 8
Jessie, these problems have been fixed in version 5.9.5-3.2+deb8u4.
We recommend that you upgrade your libonig packages.
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