Debian LTS Advisory ([SECURITY] [DLA 2020-1] libonig security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

2 years ago

Modified

Modified

2 years ago

Summary

The remote host is missing an update for the 'libonig' package(s) announced via the DSA-2020-1 advisory.

Insight

Insight

Several vulnerabilities were discovered in the Oniguruma regular expressions library, notably used in PHP mbstring. CVE-2019-19012 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. CVE-2019-19204 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. CVE-2019-19246 Heap-based buffer over-read in str_lower_case_match in regexec.c can lead to denial-of-service via a crafted regular expression.

Affected Software

Affected Software

'libonig' package(s) on Debian Linux.

Detection Method

Detection Method

Checks if a vulnerable package version is present on the target host.

Solution

Solution

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.

Common Vulnerabilities and Exposures (CVE)

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