ATTENTION! ModSecurity can allow weak requests to bypass the WAF protection!

Executive Summary

ModSecurity zaifliklari veb-ilovlarining himoyasi uchun jiddiy xavf tug'diradi, chunki ular WAF tomonidan amalga oshiriladigan tekshiruvlarni chetlab o'tish imkonini berishi mumkin. Ba'zi zaifliklar, masalan, multipart so'rovlardagi filename* parametri yoki Base64 ma'lumotlarini noto'g'ri qayta ishlash bilan bog'liq bo'lib, zararli yuklamalarni yashirishga imkon beradi. Agar WAF ma'lumotni noto'g'ri tahlil qilsa, backend ilova xavfli mazmunni qabul qilishi mumkin. Bu holat ModSecurity va veb-ilov o'rtasida xavfsizlik bo'shlig'i yaratadi.
Qo'shimcha ravishda, izohlarni olib tashlash mexanizmi va PCRE2 operatorlaridagi muammolar ham tizimning ishlashini ta'sir qilishi mumkin. Bu muammolar WAF ning o'zi, veb-server va ilova o'rtasidagi ma'lumotlarning izchil qayta ishlashiga bog'liqdir.
Tashkilotlar ModSecuritydan foydalanadigan bo'lsa, versiyalarini tekshirish, yangilanishlarni amalga oshirish va qoidalarini muntazam sinovdan o'tkazish zarur. Shuningdek, WAF himoyasiga faqat tayanmasdan, ilova o'zida ham kuchli xavfsizlik mexanizmlariga ega bo'lishi kerak.

Facts Only

* ModSecurity'da 2026-yil 30-sentabr kuni yangi xavfsizlik zaifliklari aniqlangan va tavsiyalar e'lon qilingan.
* GHSA-5pww-8rfg-9crf multipart HTTP so'rovlaridagi RFC 2231 filename* parametrini qayta ishlash bilan bog'liq muammoni o'z ichiga oladi.
* GHSA-4j47-8qcr-jf59 t:base64DecodeExt transformatsiyasi Base64 padding guruhi bilan bog'liq zaiflikni o'z ichiga oladi.
* GHSA-qrch-pjfr-9g47 removeComments transformatsiyasida ketma-ket joylashgan izohlar to'liq olib tashlanmaganda muammo yuzaga kelishi mumkin.
* GHSA-5m93-4h75-3p2w PCRE2 @rxGlobal operatorining match-limit xatolarini qayta ishlash bilan bog'liq zaiflikdir.
* Boshqa aniqlangan muammolar: GHSA-jx3r-phvx-2jmj (XML request body processor), GHSA-vmg8-j66p-vgvw (javob tarkibini tekshirish), GHSA-rcw9-2f5r-7p88 (multipart/form-data parser).
* Yangilash tavsiyalari: ModSecurity versiyasini tekshirish va kerakli yangilanishlarni o'rnatish.
* Multipart parser bilan bog'liq CVE-2026-52747 va utf8toUnicode muammosi uchun v3.0.16 versiyasiga yangilash tavsiya etilgan.

Full Take

Bu ma'lumotlar WAF himoyasining samaradorligi nafaqat u qoidalarini to'g'ri qo'llashga, balki uning xarajatlarini va qayta ishlash jarayonidagi nuanslarni ham o'z ichiga olganligi haqida asosli tushuncha beradi. Zaifliklar aynan WAF ning vazifasi (so'rovni tekshirish) bilan backend ilovaning vazifasi (ma'lumotni qayta ishlash) o'rtasidagi ajralishda yuzaga keladigan kontekstual farqlarga qaratilgan. Hujumchilar bu farqlarni, kodlash yoki ma'lumotlarni normallashtirish mexanizmlarida noto'g'ri harakatlar orqali o'tkazishga urinadi. Bu shuni ko'rsatadiki, xavfsizlik himoyasi tizimning barcha qatmodagi o'zaro bog'liqligini tushunishni talab qiladi. Agar WAF ma'lumotni to'g'ri tahlil qilsa, lekin backend uni noto'g'ri qayta ishlasa, dastlabki himoya o'tkazib yuboriladi. Bu holatda tizimning samaradorligi hisoblanmaydi. Inson imkoniyati ushbu zaifliklardan himoyalanish uchun faqat texnik yangilanishlarga emas, balki jarayonning umumiy ishlashini tahlil qilishga ham bog'liqdir. Qaysi ma'lumotlar ustidan qaysi savollar berilishi kerak?

From the original · Uzbekistan UZCERT Incidents

BE CAREFUL! ModSecurity'dagi zaifliklar WAF himoyasini chetlab o'tishga imkon berishi mumkin!

Read the full story at uzcert.uz

Sentinel — Human

Confidence

This text is well-structured technical analysis grounded in specific security advisories, strongly suggesting human authorship aimed at providing expert guidance rather than pure synthetic generation.

Signals Detected

Sentence length variance and structural flow appear typical for explanatory journalistic writing.

The text maintains a logical progression from defining the tool to identifying specific vulnerabilities and proposing solutions, showing cohesive argumentation.

Citations of specific CVEs (GHSA IDs) and references to official advisories suggest grounded sourcing, typical of technical reporting.

The complex, interconnected discussion between WAF logic and backend interpretation requires domain expertise, suggesting a level of human synthesis rather than pure LLM generation.

Human Indicators

The nuanced exploration of the gap between WAF filtering and application-side processing demonstrates an analytical focus beyond simple recitation of facts.

The structured, advice-oriented conclusion, focusing on layered defense (WAF + App logic + Monitoring), exhibits a practical, human-derived recommendation structure.