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amazonAmazonALAS-2018-1076
HistorySep 05, 2018 - 8:42 p.m.

Important: pcre

2018-09-0520:42:00
alas.aws.amazon.com
509

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

COMPLETE

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

0.151 Low

EPSS

Percentile

95.9%

Issue Overview:

2023-10-25: CVE-2015-8391 was added to this advisory.

The pcre_compile function in pcre_compile.c in PCRE before 8.38 mishandles certain [: nesting, which allows remote attackers to cause a denial of service (CPU consumption) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror. (CVE-2015-8391)

The compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22 mishandles patterns containing an (*ACCEPT) substring in conjunction with nested parentheses, which allows remote attackers to execute arbitrary code or cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror, aka ZDI-CAN-3542. (CVE-2016-3191)

Affected Packages:

pcre

Issue Correction:
Run yum update pcre to update your system.

New Packages:

i686:  
    pcre-static-8.21-7.8.amzn1.i686  
    pcre-debuginfo-8.21-7.8.amzn1.i686  
    pcre-tools-8.21-7.8.amzn1.i686  
    pcre-devel-8.21-7.8.amzn1.i686  
    pcre-8.21-7.8.amzn1.i686  
  
src:  
    pcre-8.21-7.8.amzn1.src  
  
x86_64:  
    pcre-8.21-7.8.amzn1.x86_64  
    pcre-tools-8.21-7.8.amzn1.x86_64  
    pcre-debuginfo-8.21-7.8.amzn1.x86_64  
    pcre-devel-8.21-7.8.amzn1.x86_64  
    pcre-static-8.21-7.8.amzn1.x86_64  

Additional References

Red Hat: CVE-2015-8391, CVE-2016-3191

Mitre: CVE-2015-8391, CVE-2016-3191

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

COMPLETE

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

0.151 Low

EPSS

Percentile

95.9%